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Posted: 10/17/2016 12:20:55 PM EDT
[#1]
Quoted:
I'm searching for a 10.5" to 11.5" barrel, initially for a pistol but ultimately it will be a SBR. I contacted (Manufacturer) about an 11" barrel they have (carbine gas) and they said it has a .125" gas port. I recently had a bad experience with a pistol (7.5", .085 gas port) that was overgassed. I'm waiting to hear back from two other manufacturers on a 10.5" and a 11.5", I'll post those numbers when I get them - if allowed, I'll name the manufacturers. I know gas port sizes are all over the place based on manufacturers tolerances of the chamber and bore, however, .125" on an 11" bbl (carbine gas) seems a bit large to me - what say you? That seems like a pretty large gas port. The Crane Spec for the 10.3" barrel is .070; daniel defense offers their mk18 upper with was it usually recognized as a .080 gas port. These are on 10.3" barrels; i've found that a .076-.078 will cycle most rounds reliably out of the same length barrel so imo the .125 is large but most manufacturers choose a port size that will function reliably to the average consumer with underpowered ammo. |
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Posted: 10/17/2016 12:22:29 PM EDT
[#2]
Just heard back from another manufacturer and got a correction: On the 11" mentioned above the correct gas port size is .084 - .086 for 5.56 (the .125" was for a KAK Industries 7.62x39 11" bbl). I'll go ahead and name the manufacturers, if they're banned I'll remove their names. Waiting to hear back from Ballistic Advantage and Green Mountain.
5.56 Barrels 11" bbl with carbine gas and .084 - .086" is KAK Industries 10.5" bbl with carbine gas and .080" is Mega Arms |
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Posted: 10/17/2016 12:25:11 PM EDT
[#3]
Quote HistoryQuoted:
That seems like a pretty large gas port. The Crane Spec for the 10.3" barrel is .070; daniel defense offers their mk18 upper with was it usually recognized as a .080 gas port. These are on 10.3" barrels; i've found that a .076-.078 will cycle most rounds reliably out of the same length barrel so imo the .125 is large but most manufacturers choose a port size that will function reliably to the average consumer with underpowered ammo. Quote HistoryQuoted:
Quoted:
I'm searching for a 10.5" to 11.5" barrel, initially for a pistol but ultimately it will be a SBR. I contacted (Manufacturer) about an 11" barrel they have (carbine gas) and they said it has a .125" gas port. I recently had a bad experience with a pistol (7.5", .085 gas port) that was overgassed. I'm waiting to hear back from two other manufacturers on a 10.5" and a 11.5", I'll post those numbers when I get them - if allowed, I'll name the manufacturers. I know gas port sizes are all over the place based on manufacturers tolerances of the chamber and bore, however, .125" on an 11" bbl (carbine gas) seems a bit large to me - what say you? That seems like a pretty large gas port. The Crane Spec for the 10.3" barrel is .070; daniel defense offers their mk18 upper with was it usually recognized as a .080 gas port. These are on 10.3" barrels; i've found that a .076-.078 will cycle most rounds reliably out of the same length barrel so imo the .125 is large but most manufacturers choose a port size that will function reliably to the average consumer with underpowered ammo. Just got a correction from the manufacturer: it's actually .084 - .086". The .125" was for a 7.62x39 11" bbl. All carbine gas. |
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Posted: 10/17/2016 12:26:44 PM EDT
[#4]
Quote HistoryQuoted:
Just heard back from another manufacturer and got a correction: On the 11" mentioned above the correct gas port size is .084 - .086 for 5.56 (the .125" was for a KAK Industries 7.62x39 11" bbl). I'll go ahead and name the manufacturers, if they're banned I'll remove their names. Waiting to hear back from Ballistic Advantage. 5.56 Barrels 11" bbl with carbine gas and .084 - .086" is KAK Industries 10.5" bbl with carbine gas and .080" is Mega Arms No direct experience, but Ballistic Advantic has a lot of love around here. |
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Posted: 10/17/2016 12:47:37 PM EDT
[#5]
Quote HistoryQuoted:
No direct experience, but Ballistic Advantic has a lot of love around here. Quote HistoryQuoted:
Quoted:
Just heard back from another manufacturer and got a correction: On the 11" mentioned above the correct gas port size is .084 - .086 for 5.56 (the .125" was for a KAK Industries 7.62x39 11" bbl). I'll go ahead and name the manufacturers, if they're banned I'll remove their names. Waiting to hear back from Ballistic Advantage. 5.56 Barrels 11" bbl with carbine gas and .084 - .086" is KAK Industries 10.5" bbl with carbine gas and .080" is Mega Arms No direct experience, but Ballistic Advantic has a lot of love around here. Good to know! Thanks for posting! |
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Posted: 10/17/2016 12:49:37 PM EDT
[#6]
.125? Are you sure about that? And I thought the .083 on DD barrels was huge...
My LMT 10.5 has a 0.071 and it's gassed perfectly. |
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Posted: 10/17/2016 1:08:08 PM EDT
[#7]
Green Mountain replied, their 10.5" is .087" (carbine gas).
So far: KAK Industries 11" bbl with carbine gas is .084 - .086" Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" |
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Posted: 10/17/2016 1:09:18 PM EDT
[#8]
Quote HistoryQuoted:
.125? Are you sure about that? And I thought the .083 on DD barrels was huge... My LMT 10.5 has a 0.071 and it's gassed perfectly. They corrected themselves, it's actually between .084 - .086". |
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Posted: 10/17/2016 1:13:17 PM EDT
[#9]
Quote HistoryQuoted:
They corrected themselves, it's actually between .084 - .086". Quote HistoryQuoted:
Quoted:
.125? Are you sure about that? And I thought the .083 on DD barrels was huge... My LMT 10.5 has a 0.071 and it's gassed perfectly. They corrected themselves, it's actually between .084 - .086". Good, that sounds a little better. Still huge though. 
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Posted: 10/17/2016 1:44:42 PM EDT
[#10]
Quote HistoryQuoted:
Good, that sounds a little better. Still huge though. Quote HistoryQuoted:
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Quoted:
.125? Are you sure about that? And I thought the .083 on DD barrels was huge... My LMT 10.5 has a 0.071 and it's gassed perfectly. They corrected themselves, it's actually between .084 - .086". Good, that sounds a little better. Still huge though. So far most all are coming in that range (.085"), Mega Arms is the smallest at .080. I suspect LMT is that small due to the potential for a suppressor (I assume this is the same barrel as the Mk18 uses?). Some of the SEALS and SF guys I've worked with who had Mk18's on them had suppressors attached. The NCIS knuckleheads who had them didn't have suppressors but they're also not frontline troops. |
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Posted: 10/17/2016 1:59:46 PM EDT
[#11]
This is for a 556 barrel?
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Posted: 10/17/2016 2:11:15 PM EDT
[#12]
There are a lot of variables but I have two 10.5" 5.56 barrels that have 076 and 078 gas ports. IMHO that's a good range to be in generally, though not optimal in every application.
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Posted: 10/17/2016 2:11:34 PM EDT
[#13]
Quote HistoryQuoted:
This is for a 556 barrel? Is what for a 556 barrel? I'm not sure if folks can't see some of these posts or just don't read through them. Anyway, so far, the three responding manufacturers (KAK, BA and Mega) state their gas ports are between .080 - .087 for 10.5" to 11" 5.56 carbine gassed barrels. |
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Posted: 10/17/2016 2:47:25 PM EDT
[#14]
Quote HistoryQuoted:
So far most all are coming in that range (.085"), Mega Arms is the smallest at .080. I suspect LMT is that small due to the potential for a suppressor (I assume this is the same barrel as the Mk18 uses?). Some of the SEALS and SF guys I've worked with who had Mk18's on them had suppressors attached. The NCIS knuckleheads who had them didn't have suppressors but they're also not frontline troops. Quote HistoryQuoted:
Quoted:
Quoted:
Quoted:
.125? Are you sure about that? And I thought the .083 on DD barrels was huge... My LMT 10.5 has a 0.071 and it's gassed perfectly. They corrected themselves, it's actually between .084 - .086". Good, that sounds a little better. Still huge though. So far most all are coming in that range (.085"), Mega Arms is the smallest at .080. I suspect LMT is that small due to the potential for a suppressor (I assume this is the same barrel as the Mk18 uses?). Some of the SEALS and SF guys I've worked with who had Mk18's on them had suppressors attached. The NCIS knuckleheads who had them didn't have suppressors but they're also not frontline troops. LMT isn't small; it's crane spec. The other brands you mentioned are just a lot bigger than they need to be to give the illusion of reliability at the expense of being really overgassed. |
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Posted: 10/17/2016 2:49:16 PM EDT
[#15]
Anderson posts their gas port size on their website - their 10.5" bbl has a .086" port. Ballistic Advantage stated their 11.5" has a .073" gas port and the gas port size on their proprietary 10.3" bbl 5.56 HANSON bbl is not public (it comes with a low pro gas block pinned on the bbl). All 5.56. So far:
Per the manufacturer's: KAK Industries 11" bbl with carbine gas is .084 - .086" Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" Anderson 10.5" bbl carbine gas is .086" Ballistic Advantage 11.5" bbl carbine gas is .073" Ballistic Advantage 10.3" bbl carbine gas BA HANSON with low pro gas block pinned is not public (proprietary) |
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Posted: 10/17/2016 2:52:56 PM EDT
[#16]
Quote HistoryQuoted:
LMT isn't small; it's crane spec. The other brands you mentioned are just a lot bigger than they need to be to give the illusion of reliability at the expense of being really overgassed. I didn't mean small as there's something wrong with it, simply it's smaller than the others. I'll add that gas ports don't have a specific "correct" size, it depends on the specs/tolerances of the barrel, chamber and bore. Looser tolerances, bigger gas port. Or, like what you said: To provide reliability for all ammo, but is probably overgassed. I want to avoid overgassed - there's no reason a standard AR or AR pistol should kick like a mule or require extra heavy buffers and springs. Been down that road and I'm not doing it again. |
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Posted: 10/17/2016 3:11:59 PM EDT
[#17]
Quote History[
LMT isn't small; it's crane spec. The other brands you mentioned are just a lot bigger than they need to be to give the illusion of reliability at the expense of being really overgassed. Has anyone actually seen the NSWC-Crane spec "specs"? Have they been made public? |
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Posted: 10/17/2016 6:24:43 PM EDT
[#18]
My 10.5 hardened Arms 5.56 is a .750 and it ejects around 2-2:30 suppressed and 3-3:30 unsuppressed.
Edit: carbine gas |
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Posted: 10/17/2016 7:03:54 PM EDT
[#19]
Aero replied, their gas port is .0785" on their 10.5" bbl. Hopefully this list will be useful to folks down the road. I think that's all of them I asked about but if more reply I'll add them.
From the manufacturer's: KAK Industries 11" bbl with carbine gas is .084 - .086" Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" Anderson 10.5" bbl carbine gas is .086" Ballistic Advantage 11.5" bbl carbine gas is .073" Ballistic Advantage 10.3" bbl carbine gas BA HANSON with low pro gas block pinned is not public (proprietary) Aero Precision 10.5" bbl carbine gas .0785" |
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Posted: 10/17/2016 7:08:35 PM EDT
[#20]
Quote HistoryQuoted:
My 10.5 hardened Arms 5.56 is a .750 and it ejects around 2-2:30 suppressed and 3-3:30 unsuppressed. Edit: carbine gas When you say it's .750 do you mean the gas journal (width of the barrel where the gas block attaches?) or do you mean .075" is the size of the gas port? Most gas journals on M4 patterned barrels are .750" or 3/4". Just trying to clarify. |
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Posted: 10/17/2016 9:37:10 PM EDT
[#21]
Quote HistoryQuoted: Has anyone actually seen the NSWC-Crane spec "specs"? Have they been made public? Quote HistoryQuoted: [ LMT isn't small; it's crane spec. The other brands you mentioned are just a lot bigger than they need to be to give the illusion of reliability at the expense of being really overgassed. Has anyone actually seen the NSWC-Crane spec "specs"? Have they been made public?  |
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Posted: 10/17/2016 11:52:54 PM EDT
[#22]
I thought Ballistic Advantage made Aero Precision's barrels? If this is true I wonder why they are using two different gas pot sizes.
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Posted: 10/18/2016 12:21:32 AM EDT
[#23]
Quote HistoryQuoted:
When you say it's .750 do you mean the gas journal (width of the barrel where the gas block attaches?) or do you mean .075" is the size of the gas port? Most gas journals on M4 patterned barrels are .750" or 3/4". Just trying to clarify. Quote HistoryQuoted:
Quoted:
My 10.5 hardened Arms 5.56 is a .750 and it ejects around 2-2:30 suppressed and 3-3:30 unsuppressed. Edit: carbine gas When you say it's .750 do you mean the gas journal (width of the barrel where the gas block attaches?) or do you mean .075" is the size of the gas port? Most gas journals on M4 patterned barrels are .750" or 3/4". Just trying to clarify. Good question. I just checked the product page and it says .750 at gas block. Sorry for the misinformation in the earlier post. |
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Posted: 10/18/2016 12:52:16 AM EDT
[#24]
Quote HistoryQuote HistoryQuoted:
Quoted:
[
LMT isn't small; it's crane spec. The other brands you mentioned are just a lot bigger than they need to be to give the illusion of reliability at the expense of being really overgassed. Has anyone actually seen the NSWC-Crane spec "specs"? Have they been made public? I believe that's the Mk12 that the SEALS rejected after using it for awhile. Regardless, not much stays secret anymore when it comes to small arms. |
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Posted: 10/18/2016 12:54:36 AM EDT
[#25]
Quote HistoryQuoted:
I thought Ballistic Advantage made Aero Precision's barrels? If this is true I wonder why they are using two different gas pot sizes. I could be wrong but I think Aero makes Aero's stuff. Surplus Arms and Ammo gets their stuff from Aero. Both Aero and SAA are in WA, BA's in FL. |
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Posted: 10/18/2016 12:56:32 AM EDT
[#26]
Quote HistoryQuoted:
Good question. I just checked the product page and it says .750 at gas block. Sorry for the misinformation in the earlier post. Quote HistoryQuoted:
Quoted:
Quoted:
My 10.5 hardened Arms 5.56 is a .750 and it ejects around 2-2:30 suppressed and 3-3:30 unsuppressed. Edit: carbine gas When you say it's .750 do you mean the gas journal (width of the barrel where the gas block attaches?) or do you mean .075" is the size of the gas port? Most gas journals on M4 patterned barrels are .750" or 3/4". Just trying to clarify. Good question. I just checked the product page and it says .750 at gas block. Sorry for the misinformation in the earlier post. Nothing to worry about, it just seemed coincidental! |
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Posted: 10/18/2016 1:08:49 AM EDT
[#27]
A lot of this will depend on what ammo you want to shoot and how long you want your bolt to last.
With a DI gun, ammo matters and bolt life will depend greatly on port pressure. |
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Posted: 10/18/2016 1:13:39 AM EDT
[#28]
Quote HistoryQuoted:
I could be wrong but I think Aero makes Aero's stuff. Surplus Arms and Ammo gets their stuff from Aero. Both Aero and SAA are in WA, BA's in FL. Quote HistoryQuoted:
Quoted:
I thought Ballistic Advantage made Aero Precision's barrels? If this is true I wonder why they are using two different gas pot sizes. I could be wrong but I think Aero makes Aero's stuff. Surplus Arms and Ammo gets their stuff from Aero. Both Aero and SAA are in WA, BA's in FL. Turns out Ballistic Advantage does in fact manufacture barrels for Aero. Q. DO YOU MAKE YOUR OWN COMPONENTS IN HOUSE? A. We manufacture most parts in house, including upper receivers, lower receivers, handguards, scope mounts, and various other pieces. Our barrels are manufactured at our partner company Ballistic Advantage The above was taken from Aero's FAQ. It's about halfway down the page. So the question remains, why does Aero spec a different gas port size from what BA uses on an otherwise identical barrel? I'm curious because I have an Aero marked 10.5 and always thought the gas port size was the same as BA. |
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Posted: 10/18/2016 8:34:45 AM EDT
[#29]
Quote HistoryQuoted: I believe that's the Mk12 that the SEALS rejected after using it for awhile. Regardless, not much stays secret anymore when it comes to small arms. Quote HistoryQuoted: Quoted: Quoted: [ LMT isn't small; it's crane spec. The other brands you mentioned are just a lot bigger than they need to be to give the illusion of reliability at the expense of being really overgassed. Has anyone actually seen the NSWC-Crane spec "specs"? Have they been made public? I believe that's the Mk12 that the SEALS rejected after using it for awhile. Regardless, not much stays secret anymore when it comes to small arms. MK12 is a completely different weapon, and it was not rejected from anything  |
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Posted: 10/18/2016 8:39:55 AM EDT
[#30]
Quote HistoryQuoted:
What? Did you even look at the photo? I'ts a MK18 and that is a slide from the Nav Spec War PDF on the MK18 specs. MK12 is a completely different weapon, and it was not rejected from anything
Quote HistoryQuoted:
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[
LMT isn't small; it's crane spec. The other brands you mentioned are just a lot bigger than they need to be to give the illusion of reliability at the expense of being really overgassed. Has anyone actually seen the NSWC-Crane spec "specs"? Have they been made public? I believe that's the Mk12 that the SEALS rejected after using it for awhile. Regardless, not much stays secret anymore when it comes to small arms.
sometimes.... 
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Posted: 10/18/2016 8:44:32 AM EDT
[#31]
Quote HistoryQuoted: sometimes.... Quote HistoryQuoted: Quoted: Quoted: Quoted: Quoted: Has anyone actually seen the NSWC-Crane spec "specs"? Have they been made public? I believe that's the Mk12 that the SEALS rejected after using it for awhile. Regardless, not much stays secret anymore when it comes to small arms. sometimes....     |
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Posted: 10/18/2016 8:47:47 AM EDT
[#32]
Quote HistoryQuoted:
Turns out Ballistic Advantage does in fact manufacture barrels for Aero. Q. DO YOU MAKE YOUR OWN COMPONENTS IN HOUSE? A. We manufacture most parts in house, including upper receivers, lower receivers, handguards, scope mounts, and various other pieces. Our barrels are manufactured at our partner company Ballistic Advantage The above was taken from Aero's FAQ. It's about halfway down the page. So the question remains, why does Aero spec a different gas port size from what BA uses on an otherwise identical barrel? I'm curious because I have an Aero marked 10.5 and always thought the gas port size was the same as BA. Quote HistoryQuoted:
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I thought Ballistic Advantage made Aero Precision's barrels? If this is true I wonder why they are using two different gas pot sizes. I could be wrong but I think Aero makes Aero's stuff. Surplus Arms and Ammo gets their stuff from Aero. Both Aero and SAA are in WA, BA's in FL. Turns out Ballistic Advantage does in fact manufacture barrels for Aero. Q. DO YOU MAKE YOUR OWN COMPONENTS IN HOUSE? A. We manufacture most parts in house, including upper receivers, lower receivers, handguards, scope mounts, and various other pieces. Our barrels are manufactured at our partner company Ballistic Advantage The above was taken from Aero's FAQ. It's about halfway down the page. So the question remains, why does Aero spec a different gas port size from what BA uses on an otherwise identical barrel? I'm curious because I have an Aero marked 10.5 and always thought the gas port size was the same as BA. Which two barrels from Aero and BA are you guys talking about? Maybe I missed something, BA also has a 10.5", I assume it would be exactly the same as Aero's 10.5". Likewise with the BA branded 11.5" barrel. |
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Posted: 10/18/2016 11:30:52 AM EDT
[#33]
Quote HistoryQuoted:
What? Did you even look at the photo? I'ts a MK18 and that is a slide from the Nav Spec War PDF on the MK18 specs. MK12 is a completely different weapon, and it was not rejected from anything
Quote HistoryQuoted:
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Quoted:
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[
LMT isn't small; it's crane spec. The other brands you mentioned are just a lot bigger than they need to be to give the illusion of reliability at the expense of being really overgassed. Has anyone actually seen the NSWC-Crane spec "specs"? Have they been made public? I believe that's the Mk12 that the SEALS rejected after using it for awhile. Regardless, not much stays secret anymore when it comes to small arms.
I surrender. |
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Posted: 10/18/2016 11:38:45 AM EDT
[#34]
Quote HistoryQuoted:
Which two barrels from Aero and BA are you guys talking about? Maybe I missed something, BA also has a 10.5", I assume it would be exactly the same as Aero's 10.5". Likewise with the BA branded 11.5" barrel. Quote HistoryQuoted:
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Quoted:
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I thought Ballistic Advantage made Aero Precision's barrels? If this is true I wonder why they are using two different gas pot sizes. I could be wrong but I think Aero makes Aero's stuff. Surplus Arms and Ammo gets their stuff from Aero. Both Aero and SAA are in WA, BA's in FL. Turns out Ballistic Advantage does in fact manufacture barrels for Aero. Q. DO YOU MAKE YOUR OWN COMPONENTS IN HOUSE? A. We manufacture most parts in house, including upper receivers, lower receivers, handguards, scope mounts, and various other pieces. Our barrels are manufactured at our partner company Ballistic Advantage The above was taken from Aero's FAQ. It's about halfway down the page. So the question remains, why does Aero spec a different gas port size from what BA uses on an otherwise identical barrel? I'm curious because I have an Aero marked 10.5 and always thought the gas port size was the same as BA. Which two barrels from Aero and BA are you guys talking about? Maybe I missed something, BA also has a 10.5", I assume it would be exactly the same as Aero's 10.5". Likewise with the BA branded 11.5" barrel. The three in bold: KAK Industries 11" bbl with carbine gas is .084 - .086" Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" Anderson 10.5" bbl carbine gas is .086" Ballistic Advantage 11.5" bbl carbine gas is .073" Ballistic Advantage 10.3" bbl carbine gas BA HANSON with low pro gas block pinned is not public (proprietary) Aero Precision 10.5" bbl carbine gas .0785" As far as I know, BA doesn't sell a 10.5" just the 10.3" and it has a proprietary gas port design - they wouldn't tell me the size of the gas port. It comes with a lopro gas block pinned on, which is a little unusual. |
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Posted: 10/18/2016 11:50:38 AM EDT
[#35]
Quote HistoryQuoted:
The three in bold: KAK Industries 11" bbl with carbine gas is .084 - .086" Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" Anderson 10.5" bbl carbine gas is .086" Ballistic Advantage 11.5" bbl carbine gas is .073" Ballistic Advantage 10.3" bbl carbine gas BA HANSON with low pro gas block pinned is not public (proprietary) Aero Precision 10.5" bbl carbine gas .0785" As far as I know, BA doesn't sell a 10.5" just the 10.3" and it has a proprietary gas port design - they wouldn't tell me the size of the gas port. Quote HistoryQuoted:
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I thought Ballistic Advantage made Aero Precision's barrels? If this is true I wonder why they are using two different gas pot sizes. I could be wrong but I think Aero makes Aero's stuff. Surplus Arms and Ammo gets their stuff from Aero. Both Aero and SAA are in WA, BA's in FL. Turns out Ballistic Advantage does in fact manufacture barrels for Aero. Q. DO YOU MAKE YOUR OWN COMPONENTS IN HOUSE? A. We manufacture most parts in house, including upper receivers, lower receivers, handguards, scope mounts, and various other pieces. Our barrels are manufactured at our partner company Ballistic Advantage The above was taken from Aero's FAQ. It's about halfway down the page. So the question remains, why does Aero spec a different gas port size from what BA uses on an otherwise identical barrel? I'm curious because I have an Aero marked 10.5 and always thought the gas port size was the same as BA. Which two barrels from Aero and BA are you guys talking about? Maybe I missed something, BA also has a 10.5", I assume it would be exactly the same as Aero's 10.5". Likewise with the BA branded 11.5" barrel. The three in bold: KAK Industries 11" bbl with carbine gas is .084 - .086" Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" Anderson 10.5" bbl carbine gas is .086" Ballistic Advantage 11.5" bbl carbine gas is .073" Ballistic Advantage 10.3" bbl carbine gas BA HANSON with low pro gas block pinned is not public (proprietary) Aero Precision 10.5" bbl carbine gas .0785" As far as I know, BA doesn't sell a 10.5" just the 10.3" and it has a proprietary gas port design - they wouldn't tell me the size of the gas port.  BA 10.5
You can still find out the Gas port size from the BA Hanson barrel. I doubt they ship it completed assembled. You'd still need to use a barrel nut in most instances, and to mount it, removal of the gas block would be necessary.. |
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Posted: 10/18/2016 1:47:12 PM EDT
[#36]
Quote HistoryYou can still find out the Gas port size from the BA Hanson barrel. I doubt they ship it completed assembled. You'd still need to use a barrel nut in most instances, and to mount it, removal of the gas block would be necessary..
Yeah, I posed that question to them a little while ago, waiting for a response. |
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Posted: 10/18/2016 1:57:43 PM EDT
[#37]
Quote HistoryQuoted:
BA 10.5
You can still find out the Gas port size from the BA Hanson barrel. I doubt they ship it completed assembled. You'd still need to use a barrel nut in most instances, and to mount it, removal of the gas block would be necessary.. Quote HistoryQuoted:
Quoted:
The three in bold: KAK Industries 11" bbl with carbine gas is .084 - .086" Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" Anderson 10.5" bbl carbine gas is .086" Ballistic Advantage 11.5" bbl carbine gas is .073" Ballistic Advantage 10.3" bbl carbine gas BA HANSON with low pro gas block pinned is not public (proprietary) Aero Precision 10.5" bbl carbine gas .0785" As far as I know, BA doesn't sell a 10.5" just the 10.3" and it has a proprietary gas port design - they wouldn't tell me the size of the gas port. BA 10.5
You can still find out the Gas port size from the BA Hanson barrel. I doubt they ship it completed assembled. You'd still need to use a barrel nut in most instances, and to mount it, removal of the gas block would be necessary.. I was gonna say, both my SBR's are BA marked 10.5" barrels. |
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Posted: 10/18/2016 5:26:51 PM EDT
[#38]
Quote HistoryQuoted:
I was gonna say, both my SBR's are BA marked 10.5" barrels. Quote HistoryQuoted:
Quoted:
Quoted:
The three in bold: KAK Industries 11" bbl with carbine gas is .084 - .086" Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" Anderson 10.5" bbl carbine gas is .086" Ballistic Advantage 11.5" bbl carbine gas is .073" Ballistic Advantage 10.3" bbl carbine gas BA HANSON with low pro gas block pinned is not public (proprietary) Aero Precision 10.5" bbl carbine gas .0785" As far as I know, BA doesn't sell a 10.5" just the 10.3" and it has a proprietary gas port design - they wouldn't tell me the size of the gas port. BA 10.5
You can still find out the Gas port size from the BA Hanson barrel. I doubt they ship it completed assembled. You'd still need to use a barrel nut in most instances, and to mount it, removal of the gas block would be necessary.. I was gonna say, both my SBR's are BA marked 10.5" barrels. They're sold out of the BA 10.5" bbl's so they're not here. |
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Posted: 10/18/2016 8:09:09 PM EDT
[#39]
Shot a email off to Jason at Andro Corp, their barrels are made by BA and they show 10.5" in stock.
Hopefully he can help us out. |
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Posted: 10/18/2016 9:42:35 PM EDT
[#40]
Nice thread, interested in the BA port size and PSA's FN 10.5 CHF barrel
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Posted: 10/18/2016 10:11:06 PM EDT
[#41]
It would be great if more came on board and contributed, maybe even make this a sticky if it pans out. I think its an important topic a lot of folks are interested in, especially builders. I also think that in the long term it might even influence how some manufacturers design their barrels, especially if they know we're paying attention to details like this and we aren't stuck with overgassed weapons that wear out our components faster.
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Posted: 10/18/2016 10:19:26 PM EDT
[#42]
I ordered a 10.3 ADCO CQB which uses the DD 10.3 barrel with FSB. I asked before purchasing what the gas port was because I was just going to by a 16'' and have it cut. They told me they checked with calipers and it was .070. My only guess is that they got a batch of the .gov overruns in.
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Posted: 10/18/2016 10:34:58 PM EDT
[#43]
Jason at Andro Corp. said they run around 0.080".
He said most of the short barrels from BA run over sized for running suppressed and unsuppressed. The Andro Corp barrels are the same spec as their BA counter parts. Anyone ask Ballistic Advantage about the 10.5"? I don't want to bug them if someone else has already. |
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Posted: 10/18/2016 11:09:04 PM EDT
[#44]
Quote HistoryQuoted:
I ordered a 10.3 ADCO CQB which uses the DD 10.3 barrel with FSB. I asked before purchasing what the gas port was because I was just going to by a 16'' and have it cut. They told me they checked with calipers and it was .070. My only guess is that they got a batch of the .gov overruns in. I wonder if that's still the case with what they're currently selling? |
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Posted: 10/19/2016 9:33:58 AM EDT
[#45]
KAK Industries 11" bbl with carbine gas is .084 - .086"
Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" Anderson 10.5" bbl carbine gas is .086" Ballistic Advantage 11.5" bbl carbine gas is .073" Ballistic Advantage 10.3" bbl carbine gas BA HANSON with low pro gas block pinned is not public (proprietary) Aero Precision 10.5" bbl carbine gas .0785" Faxon 10.5" Gov't/Socom bbl with carbine gas is .080" Faxon 11.5" Big GUNNER bbl with mid-length gas is .110" |
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Posted: 10/19/2016 9:35:14 AM EDT
[#46]
Quote HistoryQuoted: I wonder if that's still the case with what they're currently selling? Quote HistoryQuoted: Quoted: I ordered a 10.3 ADCO CQB which uses the DD 10.3 barrel with FSB. I asked before purchasing what the gas port was because I was just going to by a 16'' and have it cut. They told me they checked with calipers and it was .070. My only guess is that they got a batch of the .gov overruns in. I wonder if that's still the case with what they're currently selling? But who knows, it could be the smaller size? |
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Posted: 10/19/2016 10:46:33 AM EDT
[#47]
So how important is the size of the gas port?
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Posted: 10/19/2016 11:04:43 AM EDT
[#48]
Quote HistoryQuoted:
So how important is the size of the gas port? Pretty important when it comes to what ammunition a weapon will cycle reliably, but also when a suppressor is to be added to the platform. The increased pressure and gas "squeezed" back into the system makes an already overgassed (port too big) rifle, even more overgassed. Effects of this are obvious malfunctions and increased wear and tear on the internal components of the weapon. On the flip side, a port that is too small, or optimized for a certain minimum ammunition "strength," will not cycle ammunition reliably on its own without a suppressor, but will cycle fine WITH a suppressor. The gas port is the root cause of the issues that a lot of rifles face, and the normal piece to implement is an adjustable gas block. I'm not terribly sold on them, only 1 or two I would entertain to try, such as the baby govnah since it is a necked down gas block and has no mechanical component, but they do work. YMMV, of course. In addition to this you can change buffer weights and springs to counteract the effects of the gas, but it never really addresses the issue. That gas still needs to go somewhere. The general consensus is that most shooters would rather have a port that is slightly too large as opposed to too small since the commercial market operates on such a wide variety of ammunition from top shelf match cartridges, all the way down to low powered steel cased "plinking" ammo. It's more cost effective for companies to drill out to a slightly larger hole and cover that range than to hone in on a specific target ammunition type. They'll leave the fine tuning up to the end user. once again, YMMV |
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Posted: 10/19/2016 11:30:22 AM EDT
[#49]
Quote HistoryQuoted:
Pretty important when it comes to what ammunition a weapon will cycle reliably, but also when a suppressor is to be added to the platform. The increased pressure and gas "squeezed" back into the system makes an already overgassed (port too big) rifle, even more overgassed. Effects of this are obvious malfunctions and increased wear and tear on the internal components of the weapon. On the flip side, a port that is too small, or optimized for a certain minimum ammunition "strength," will not cycle ammunition reliably on its own without a suppressor, but will cycle fine WITH a suppressor. The gas port is the root cause of the issues that a lot of rifles face, and the normal piece to implement is an adjustable gas block. I'm not terribly sold on them, only 1 or two I would entertain to try, such as the baby govnah since it is a necked down gas block and has no mechanical component, but they do work. YMMV, of course. In addition to this you can change buffer weights and springs to counteract the effects of the gas, but it never really addresses the issue. That gas still needs to go somewhere. The general consensus is that most shooters would rather have a port that is slightly too large as opposed to too small since the commercial market operates on such a wide variety of ammunition from top shelf match cartridges, all the way down to low powered steel cased "plinking" ammo. It's more cost effective for companies to drill out to a slightly larger hole and cover that range than to hone in on a specific target ammunition type. They'll leave the fine tuning up to the end user. once again, YMMV Quote HistoryQuoted:
Quoted:
So how important is the size of the gas port? Pretty important when it comes to what ammunition a weapon will cycle reliably, but also when a suppressor is to be added to the platform. The increased pressure and gas "squeezed" back into the system makes an already overgassed (port too big) rifle, even more overgassed. Effects of this are obvious malfunctions and increased wear and tear on the internal components of the weapon. On the flip side, a port that is too small, or optimized for a certain minimum ammunition "strength," will not cycle ammunition reliably on its own without a suppressor, but will cycle fine WITH a suppressor. The gas port is the root cause of the issues that a lot of rifles face, and the normal piece to implement is an adjustable gas block. I'm not terribly sold on them, only 1 or two I would entertain to try, such as the baby govnah since it is a necked down gas block and has no mechanical component, but they do work. YMMV, of course. In addition to this you can change buffer weights and springs to counteract the effects of the gas, but it never really addresses the issue. That gas still needs to go somewhere. The general consensus is that most shooters would rather have a port that is slightly too large as opposed to too small since the commercial market operates on such a wide variety of ammunition from top shelf match cartridges, all the way down to low powered steel cased "plinking" ammo. It's more cost effective for companies to drill out to a slightly larger hole and cover that range than to hone in on a specific target ammunition type. They'll leave the fine tuning up to the end user. once again, YMMV Thank you for your insight, I am new to the gun world and am building my first AR. 
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Posted: 10/19/2016 11:45:17 AM EDT
[#50]
Quote HistoryQuoted:
Thank you for your insight, I am new to the gun world and am building my first AR.
Quote HistoryQuoted:
Quoted:
Quoted:
So how important is the size of the gas port? Pretty important when it comes to what ammunition a weapon will cycle reliably, but also when a suppressor is to be added to the platform. The increased pressure and gas "squeezed" back into the system makes an already overgassed (port too big) rifle, even more overgassed. Effects of this are obvious malfunctions and increased wear and tear on the internal components of the weapon. On the flip side, a port that is too small, or optimized for a certain minimum ammunition "strength," will not cycle ammunition reliably on its own without a suppressor, but will cycle fine WITH a suppressor. The gas port is the root cause of the issues that a lot of rifles face, and the normal piece to implement is an adjustable gas block. I'm not terribly sold on them, only 1 or two I would entertain to try, such as the baby govnah since it is a necked down gas block and has no mechanical component, but they do work. YMMV, of course. In addition to this you can change buffer weights and springs to counteract the effects of the gas, but it never really addresses the issue. That gas still needs to go somewhere. The general consensus is that most shooters would rather have a port that is slightly too large as opposed to too small since the commercial market operates on such a wide variety of ammunition from top shelf match cartridges, all the way down to low powered steel cased "plinking" ammo. It's more cost effective for companies to drill out to a slightly larger hole and cover that range than to hone in on a specific target ammunition type. They'll leave the fine tuning up to the end user. once again, YMMV Thank you for your insight, I am new to the gun world and am building my first AR.
The bank of information here will most certainly become overwhelming at times and questions will come up like, do I want a lightweight barrel? Do I want a lightweight carrier?Do I need a carbine or midlength gas system? DO I need an H, H2, H3 buffer? Do I need M4 feed ramps? Do I need an adjustable gas block? What buffer spring works best? and on and on and on. The combinations are essentially endless, and you'll never see 2 rifles exactly alike, unless you spend time in the clone world, which even then everyone seems to have their own touch on it and no two are painted identical  If its your first, I would suggest either building the lower and purchasing an Upper ready to go, or taking a lot of time reading before just scooping up parts pre-election.
MOST combinations or parts work. but some dont and it can be a headache troubleshooting to only find out that 2 perfectly capable and quality parts just dont play well with one another. If I had it to do over again, I would go back and buy an out of the box Colt 6920, shoot the snot out of it, and built from then on. I purchased a DPMS, and have changed Every single part except the upper receiver and the bolt that mated to the new barrel. The lower was even changed so its not even technically a dPMS anymore
whatever you do, remember this: Buy once, cry once. I've learned this the hard way.... Just my .02. |
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