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AZ, USA
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Posted: 5/17/2016 9:34:50 PM EDT
I'm looking at the 18 inch predatAR barrel and was wondering if the Faxon gas block screws will line up with the predrilled dimples on the barrel. Thanks.
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TX, USA
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Posted: 5/17/2016 10:03:55 PM EDT
[#1]
Originally Posted By axeltow:
Originally Posted By 2StampBob:
Originally Posted By axeltow:
Also worth noting, SLR rifle works is having a 10% off sale. If you need an adjustable gas block. Which adjustable gas block should I order for a 12 inch stealth that I'm (most likely) going to have cut down to 10.3 or 10.5" ? Your barrel has a .750" gas block diameter and .450" dimple spacing, so the sentry 7 with .450 spacing should do the trick. .625 diameter on the tAR barrel though per LT page, assuming spacing is the same. |
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Posted: 5/17/2016 10:17:57 PM EDT
[#2]
Larue uses 3 hold down screws, .450" spacing
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Posted: 5/17/2016 11:13:12 PM EDT
[#3]
Quote HistoryOriginally Posted By jeep450:
Larue uses 3 hold down screws, .450" spacing 
AFAIK: Only the LaRue blocks align with all 3... SLR makes adjustable blocks in .450 spacing to the first/last hole for both .750" and .625" barrels. My stealth and tAR barrels both wear SLR gas blocks. |
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Posted: 5/18/2016 12:46:57 AM EDT
[#4]
I have a 14.5 inch Stealth bbl that only has 2 holes @ .450" spacing. Got it last year during one of the Sales!
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USA
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Posted: 5/18/2016 6:18:21 AM EDT
[#5]
Thanks Ulfhednar_42, that's very helpful.
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AZ, USA
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Posted: 5/18/2016 8:43:19 AM EDT
[#6]
Thanks for the info everyone. I ordered the LaRue gas block with the barrel to avoid any issues.
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Posted: 5/18/2016 9:01:42 AM EDT
[#7]
Originally Posted By 556_Chowder:
I'm looking at the 18 inch predatAR barrel and was wondering if the Faxon gas block screws will line up with the predrilled dimples on the barrel. Thanks. We will check and confirm. Stand by. |
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Posted: 5/18/2016 10:58:04 AM EDT
[#8]
Quote HistoryOriginally Posted By 556_Chowder:
Thanks for the info everyone. I ordered the LaRue gas block with the barrel to avoid any issues. I did this as well. |
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AZ, USA
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Posted: 5/18/2016 4:28:32 PM EDT
[Last Edit: 556_Chowder]
[#9]
Quote HistoryOriginally Posted By RogueNathan:
We will check and confirm. Stand by. Quote HistoryOriginally Posted By RogueNathan:
Originally Posted By 556_Chowder:
I'm looking at the 18 inch predatAR barrel and was wondering if the Faxon gas block screws will line up with the predrilled dimples on the barrel. Thanks. We will check and confirm. Stand by. Cool. Thank you. |
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Posted: 5/19/2016 4:33:42 PM EDT
[#10]
Is there a list of the compatible gas blocks that line up with this spacing?
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Posted: 5/19/2016 4:47:16 PM EDT
[#11]
I don't think anybody has come up with an official list. If I remember when the first barrel sale happened, there were talked about which ones work and they included the SLR adjustable, Odin Works, and Radical Firearms. SLR makes an adjustable gas block that you can order with the .45 spacing. I personally know the Odin Works block works as I have one on a barrel, and the Radical is purely hearsay.
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Posted: 5/19/2016 7:09:12 PM EDT
[#12]
The SLR Sentry page say the set screw spacing is .40 not .45 - at least for the .625 model
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Posted: 5/19/2016 8:20:26 PM EDT
[#13]
Quote HistoryOriginally Posted By cantbeatphysics:
The SLR Sentry page say the set screw spacing is .40 not .45 - at least for the .625 model There is a specific .450" spacing model for LaRue barrels. You're right the normal blocks aren't .450" |
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GU, USA
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Posted: 5/19/2016 8:56:19 PM EDT
[#14]
Quote HistoryOriginally Posted By Ulfhednar_42:
There is a specific .450" spacing model for LaRue barrels. You're right the normal blocks aren't .450" Quote HistoryOriginally Posted By Ulfhednar_42:
Originally Posted By cantbeatphysics:
The SLR Sentry page say the set screw spacing is .40 not .45 - at least for the .625 model There is a specific .450" spacing model for LaRue barrels. You're right the normal blocks aren't .450" Sentry 6 Set Screw Adjustable Gas Block- .450" Set Screw Spacing Here is the GB spacing list mentioned earlier (forgot which member posted this): Odin works lo pro- .450 Quentin Defense lo pro .750 and .625- .450 Radical lo pro (not confirmed by me but by others in thread) .450 (Not .450) BCM, Vltor, MI, Rainier, DSA, fortis, all are .460 spacing 2aA .470 Geissele .410 Spikes, YHM, DD MK12, .420 CMMG .470 Parallax tac .400 SLR .400 PRI .500 Syrac .500 Faxon.550 use 3 set screws Troy .385 KAC .328 Wilson combat .415 |
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Posted: 5/19/2016 10:05:03 PM EDT
[#15]
Quote HistoryOriginally Posted By icura:
Sentry 6 Set Screw Adjustable Gas Block- .450" Set Screw Spacing Here is the GB spacing list mentioned earlier (forgot which member posted this): Odin works lo pro- .450 Quentin Defense lo pro .750 and .625- .450 Radical lo pro (not confirmed by me but by others in thread) .450 (Not .450) BCM, Vltor, MI, Rainier, DSA, fortis, all are .460 spacing 2aA .470 Geissele .410 Spikes, YHM, DD MK12, .420 CMMG .470 Parallax tac .400 SLR .400 PRI .500 Syrac .500 Faxon.550 use 3 set screws Troy .385 KAC .328 Wilson combat .415 Quote HistoryOriginally Posted By icura:
Originally Posted By Ulfhednar_42:
Originally Posted By cantbeatphysics:
The SLR Sentry page say the set screw spacing is .40 not .45 - at least for the .625 model There is a specific .450" spacing model for LaRue barrels. You're right the normal blocks aren't .450" Sentry 6 Set Screw Adjustable Gas Block- .450" Set Screw Spacing Here is the GB spacing list mentioned earlier (forgot which member posted this): Odin works lo pro- .450 Quentin Defense lo pro .750 and .625- .450 Radical lo pro (not confirmed by me but by others in thread) .450 (Not .450) BCM, Vltor, MI, Rainier, DSA, fortis, all are .460 spacing 2aA .470 Geissele .410 Spikes, YHM, DD MK12, .420 CMMG .470 Parallax tac .400 SLR .400 PRI .500 Syrac .500 Faxon.550 use 3 set screws Troy .385 KAC .328 Wilson combat .415 That is very useful. Thanks for sharing this. |
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Posted: 5/20/2016 12:15:41 PM EDT
[#16]
Quote HistoryOriginally Posted By Ulfhednar_42:
http://www.larue.com/media/graphics/GasBlockInterface.jpg AFAIK: Only the LaRue blocks align with all 3... SLR makes adjustable blocks in .450 spacing to the first/last hole for both .750" and .625" barrels. My stealth and tAR barrels both wear SLR gas blocks. Quote HistoryOriginally Posted By Ulfhednar_42:
Originally Posted By jeep450:
Larue uses 3 hold down screws, .450" spacing http://www.larue.com/media/graphics/GasBlockInterface.jpg AFAIK: Only the LaRue blocks align with all 3... SLR makes adjustable blocks in .450 spacing to the first/last hole for both .750" and .625" barrels. My stealth and tAR barrels both wear SLR gas blocks. This. My 10.5" has the SLR on it. |
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GU, USA
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Posted: 5/21/2016 12:25:38 AM EDT
[#17]
Quote HistoryOriginally Posted By Spacejunk:
That is very useful. Thanks for sharing this. Quote HistoryOriginally Posted By Spacejunk:
Originally Posted By icura:
Originally Posted By Ulfhednar_42:
Originally Posted By cantbeatphysics:
The SLR Sentry page say the set screw spacing is .40 not .45 - at least for the .625 model There is a specific .450" spacing model for LaRue barrels. You're right the normal blocks aren't .450" Sentry 6 Set Screw Adjustable Gas Block- .450" Set Screw Spacing Here is the GB spacing list mentioned earlier (forgot which member posted this): Odin works lo pro- .450 Quentin Defense lo pro .750 and .625- .450 Radical lo pro (not confirmed by me but by others in thread) .450 (Not .450) BCM, Vltor, MI, Rainier, DSA, fortis, all are .460 spacing 2aA .470 Geissele .410 Spikes, YHM, DD MK12, .420 CMMG .470 Parallax tac .400 SLR .400 PRI .500 Syrac .500 Faxon.550 use 3 set screws Troy .385 KAC .328 Wilson combat .415 That is very useful. Thanks for sharing this. no problem, just passing along the info that I got from another member from last year's ToT sale...came in very handy. |
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Posted: 6/12/2016 2:33:59 PM EDT
[#18]
SLR Rifleworks makes a NON-Adjustable gas block with the .450 spacing. For those who are looking for another option. It's only $35.99.
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Posted: 6/12/2016 6:58:44 PM EDT
[#19]
YHM low profile gas block fit just fine.
Front and rear holes lined up perfectly. |
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Posted: 6/12/2016 7:06:57 PM EDT
[#20]
Quote HistoryOriginally Posted By TheKnack:
YHM low profile gas block fit just fine. Front and rear holes lined up perfectly. I was gonna post this as well. |
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Posted: 6/13/2016 9:37:00 AM EDT
[#21]
Quote HistoryOriginally Posted By RogueNathan:
We will check and confirm. Stand by. Quote HistoryOriginally Posted By RogueNathan:
Originally Posted By 556_Chowder:
I'm looking at the 18 inch predatAR barrel and was wondering if the Faxon gas block screws will line up with the predrilled dimples on the barrel. Thanks. We will check and confirm. Stand by. Checked and we are not directly compatible (except for the first screw). Our three screws are as follows: .300" .575" .850" |
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NY, USA
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Posted: 6/13/2016 3:30:56 PM EDT
[#22]
Just curious. Any reason not to use a LaRue gas block?
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Posted: 6/13/2016 5:34:00 PM EDT
[#23]
Quote HistoryOriginally Posted By AR15DELTAHBAR:
Just curious. Any reason not to use a LaRue gas block? Two reasons...One is that you can use SLR's adjustable gas block. I assume the second is because people don't want to pay $69 for the Larue gas block. |
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Posted: 6/14/2016 10:16:21 AM EDT
[#24]
Quote HistoryOriginally Posted By AR15DELTAHBAR:
Just curious. Any reason not to use a LaRue gas block? I wonder if an F marked FSB could be secured and properly aligned by drilling and tapping corresponding holes from underneath to match the barrel's dimples? Does the first dimple correspond with the gas port hole? |
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Posted: 6/14/2016 11:24:29 PM EDT
[#25]
Quote HistoryOriginally Posted By AR15DELTAHBAR:
Just curious. Any reason not to use a LaRue gas block? LaRue's .625" gas block weighs 3 or 4 ounces. It's easily twice as heavy as the SLR adjustable. On the 12" stealth you're dealing with a gas port that Ron Jeremy drilled. But the .750" on a 20" stealth is a good fit. :) |
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Posted: 6/20/2016 11:19:52 AM EDT
[Last Edit: QtrHorse]
[#26]
Quick update.....
I bought one of the PredatAR barrels. I did not want to use the Larue gas block (being cheap) and did not think I needed an adjustable gas block (SLR). Maybe I will regret that later. I was looking for a .625 quality gas block that had .450 spacing. I was going to have to go with the Quentin Defense .625 gas block. I was going to place an order with SLR today anyway to get in on the Fathers Day discount so I called SLR Rifleworks and asked just to make sure that they did not have a .625 gas block with .450 spacing (did not list one on their website). I spoke to Todd and he is going to make some that will be available in two weeks. If you need one give them a call. They will even let you get in on the Fathers Day 10% off deal if you call in and hit extension 3. Below should be an updated list of compatible gas blocks for the Larue .450 spacing (first and last hole). SLR Sentry 6 Adjustable .625 = .450 SLR Sentry 7 Adjustable .750 = .450 SLR Micro Non Adjustable .625 & .750 = .450 Quentin Defense lo pro .750 & .625- .450 Odin works lo pro .750 = .450 Radical lo pro (not confirmed by me but by others in thread) .450 (Not .450) BCM, Vltor, MI, Rainier, DSA, fortis, all are = .460 2aA = .470 Geissele = .410 Spikes, YHM, DD MK12 = .420 CMMG = .470 Parallax tac = .400 SLR = .400 PRI = .500 Syrac = .500 Faxon = .550 use 3 set screws Troy = .385 KAC = .328 Wilson combat = .415 |
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Posted: 6/20/2016 11:25:07 AM EDT
[#27]
Quote HistoryOriginally Posted By Wolfhound76:
I was gonna post this as well. Quote HistoryOriginally Posted By Wolfhound76:
Originally Posted By TheKnack:
YHM low profile gas block fit just fine. Front and rear holes lined up perfectly. I was gonna post this as well. I thought the YHM gas block has .420 spacing? I'm guessing the spacing was close enough or did it line up perfectly, .450 spacing? |
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Posted: 6/21/2016 12:12:39 AM EDT
[#28]
Lined up perfectly for me.
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Posted: 7/13/2016 2:30:51 PM EDT
[#29]
Quick update....
SLR now has the .625 non adjustable gas blocks with the .450 spacing in stock for the tAR barrels. |
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Posted: 8/7/2016 10:37:06 PM EDT
[#30]
I took my PredatAR barrel to the shop with me to try to find a gas block. The $20 Guntec matched up with the dimples perfectly.
http://www.guntecusa.com/index.php?route=product/product&product_id=799 |
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Posted: 8/8/2016 12:11:39 AM EDT
[#31]
Quote HistoryOriginally Posted By optimator:
I took my PredatAR barrel to the shop with me to try to find a gas block. The $20 Guntec matched up with the dimples perfectly. http://www.guntecusa.com/index.php?route=product/product&product_id=799 I see $27.95? Honestly have no idea, how well would aluminum hold up over time for a part like this? |
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Posted: 8/8/2016 12:39:44 AM EDT
[#32]
Quote HistoryOriginally Posted By QtrHorse:
I see $27.95? Honestly have no idea, how well would aluminum hold up over time for a part like this? Quote HistoryOriginally Posted By QtrHorse:
Originally Posted By optimator:
I took my PredatAR barrel to the shop with me to try to find a gas block. The $20 Guntec matched up with the dimples perfectly. http://www.guntecusa.com/index.php?route=product/product&product_id=799 I see $27.95? Honestly have no idea, how well would aluminum hold up over time for a part like this? My shop charged me 20. Well see how it holds up. If it doesn't, it's not a big deal to swap it out. |
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