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Posted: 8/26/2015 5:35:23 PM EDT
[#1]
Heavy buffer currently, but have tried a carbine all the way up to a H2 in my AAC PMS 9". Barrel, gas block, gas port size, BCG, buffer spring...a lot of stuff combining for the full experience but buffers can definitely help smooth things out.
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Posted: 8/26/2015 5:43:21 PM EDT
[#2]
my 12.5" suppressed can cycle perfectly with H1 or H2 for subsonics only.
With supers, it is hit-or-miss and I usually get FTF's after a few rounds on either one. Not sure what to do, as I'd like to run more supers. Buffer does not solve the problem. I will likely shoot it suppressed all the time, so "take of the suppressor" may not help (or maybe it helps diagnose something?) |
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Posted: 8/26/2015 5:43:48 PM EDT
[#3]
8.2" Noveske, JP SCS
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Posted: 8/26/2015 6:25:26 PM EDT
[#4]
12.5" H2 buffer, shoots supers and subs. I had an extraction issue out of the gate, but a 006 Viton O-Ring around the extractor spring solved the issue.
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Posted: 8/26/2015 7:17:34 PM EDT
[#5]
8.5"
Depends on ammo and can/no-can. But in general, Carbine without can, Spikes T2 with can. |
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Posted: 8/26/2015 7:26:00 PM EDT
[#6]
Spikes ST2 seems to work for me. 10.5" bbl with Pistol Gas.
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Posted: 8/26/2015 8:54:45 PM EDT
[#7]
Quote HistoryQuoted:
8.2" Noveske, JP SCS 8" Noveske and 7.7" Noveske with 8" gas port diameter. The 7.7 was cut from a 16" barrel and gas port drilled to match 8" data. |
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Posted: 8/26/2015 9:25:26 PM EDT
[#8]
I run an H3 in my AAC 9" SBR. It's suppressed so I wanted to give bolt as much "sprong" coming back as possible to push through the dirty chamber. It's seems to work out fantastically and my ejected brass is at the 4 o'clock position.
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Posted: 8/26/2015 9:46:50 PM EDT
[#9]
Standard Carbine buffer and spring for 16 inch carbine gas length barrel and 8.5 inch pistol gas length barrel.
I am able to shoot subs and supers suppressed and unsupressed without issue |
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Posted: 8/29/2015 11:39:42 AM EDT
[#10]
Standard Carbine buffer and spring for 16 inch carbine gas length barrel and 10.5 inch carbine gas length barrel.
I am able to shoot subs and supers suppressed and unsupressed without issue |
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Posted: 8/29/2015 12:26:21 PM EDT
[#11]
8.5" Spikes T2
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Posted: 8/29/2015 12:48:14 PM EDT
[#12]
H3, I never shoot supers.
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Posted: 8/29/2015 3:22:20 PM EDT
[#13]
I opened up my port and use a H for subs and a H2 for supers, cycles just fine. I've also switched from an M16 carrier to an AR15 carrier when running certain sub loads.
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Posted: 8/29/2015 5:16:26 PM EDT
[#14]
10.2 Noveske Barrel with a H2 Buffer works supressed or not.
MAHA |
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Posted: 8/29/2015 6:08:11 PM EDT
[#15]
10.2 with no ajustable gas. I use JP Silent capture spring and have had zero issues.
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Posted: 8/30/2015 12:56:49 AM EDT
[#16]
I have a 12 inch Palmetto CHF barrel with a pistol gas and non adjustable gas block. I have only used an H buffer and regular carbine spring. Works great for me suppressed or unsuppressed, supers and subs. Cycles subs unsuppressed just fine too. I tried it just for kicks.
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Posted: 8/30/2015 1:01:04 AM EDT
[#17]
8.5 inch kak barrel. H2 with subs and supers. Have not shot suppressed yet.
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Posted: 8/30/2015 1:06:09 AM EDT
[#18]
10.5" with a standard carbine buffer, and mine cycles 168gr subsonics fine(suppressed or unsuppressed). I really dont see the point in a heavier buffer if you want shoot subs
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Posted: 8/30/2015 7:43:23 AM EDT
[#19]
Quote HistoryQuoted:
10.5" with a standard carbine buffer, and mine cycles 168gr subsonics fine(suppressed or unsuppressed). I really dont see the point in a heavier buffer if you want shoot subs Exactly. In helping out a lot of guys who are having cycling issues, often they get this idea that they have to have the heavier buffer. more then once I have dealt with someone who had a 16 inch carbine gas with a .93 gas port and a H2 buffer and cannot figure out why it won't cycle subs unsuppressed, or a 10.2 inch barrel with a .75 gas port and an H3 buffer because an H3 is better then an H2 
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Posted: 8/30/2015 8:33:47 AM EDT
[#20]
get adjustable gas block
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Posted: 8/31/2015 8:28:26 AM EDT
[#21]
Noveske 8.2" runs carbine, H, or ST-2 without issue, subs or supers. Nothing fancy needed unless you have a barrel problem.
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Posted: 8/31/2015 8:30:32 AM EDT
[#22]
Mine doesn't care what I use...everything from a Std carbine to a 9mm one. All suppressed and unsuppressed with a noveske 10" and a Aim NIB BCG.
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Posted: 8/31/2015 5:34:14 PM EDT
[#23]
JP Silent Captured Spring with the "WHITE" spring. Works for supers and subs suppressed. Not suppressed.....I have no idea....I don't shoot unsuppressed.
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Posted: 8/31/2015 5:47:20 PM EDT
[#24]
My AAC 9" upper works with all ammo combinations with an H2 buffer.
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Posted: 8/31/2015 10:02:28 PM EDT
[#25]
JPSCS has served me well. I didn't think it would make that big of a deal until I heard the audible "sproing" when shooting suppressed.
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Posted: 9/1/2015 6:12:25 PM EDT
[#26]
10.3" upper(super/sub), Colt H3. Zero problems(w & w/o can).
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Posted: 9/2/2015 3:31:22 PM EDT
[#27]
Quote HistoryQuoted:
get adjustable gas block Not needed with 300 blk. It is not over gassed when suppressed as long as your gas port is the correct size. |
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Posted: 9/2/2015 6:33:55 PM EDT
[#28]
Quote HistoryQuoted:
Not needed with 300 blk. It is not over gassed when suppressed as long as your gas port is the correct size. Quote HistoryQuoted:
Quoted:
get adjustable gas block Not needed with 300 blk. It is not over gassed when suppressed as long as your gas port is the correct size. Not needed, but it's nice to tailor the gas setting to each load exactly rather than setting it up to just barely function with subs and still have more gas than is needed with supers. My 8" CMMG has just enough gas to function suppressed with 230gr subs at 1050fps (I know this because when I put my adjustable gas block on, even one click closed would stop it from locking back empty). Going from the subs to the 125gr supers I was able to close the gas block 10 clicks before the rifle would stop locking back empty. So I run it 8 clicks from full open now with supers (suppressed). Recoil is less, I get less gas blowback through the chamber suppressed, and I don't have cam pin recess wear anymore. Oh and to the OP... Keep in mind what buffer tube people are running when they tell you what weight they're using, because only the milspec buffer tubes are a standard length. The commercial carbine and pistol tubes vary and the spring preload change effects what buffer weight is needed. I have had to change buffer weights in several rifles when switching from commercial to milspec tubes. Usually the commercial tubes are about 3/4" longer and have a slanted end (all the milspec tubes I have seen have a 90 degree end). 
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Posted: 9/3/2015 4:55:57 PM EDT
[#29]
I'm shooting a 10.5" upper with pistol length gas and an H2 buffer. It runs subs and supers both with and without the can.
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Posted: 9/3/2015 5:13:24 PM EDT
[#30]
9" AAC MPW with H2 buffer
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Posted: 9/3/2015 6:16:10 PM EDT
[#31]
Quote HistoryQuoted:
Not needed with 300 blk. It is not over gassed when suppressed as long as your gas port is the correct size. Quote HistoryQuoted:
Quoted:
get adjustable gas block Not needed with 300 blk. It is not over gassed when suppressed as long as your gas port is the correct size. I have to agree.....they may not be needed, but custom tuning the gas system is a very nice feature. |
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Posted: 9/3/2015 6:40:34 PM EDT
[#32]
Quote HistoryQuoted:
JPSCS has served me well. I didn't think it would make that big of a deal until I heard the audible "sproing" when shooting suppressed. I love mine, it runs like a top with supers/subs suppressed or not. 
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Posted: 9/4/2015 7:41:08 PM EDT
[#33]
H2 8.5 CMMG barrel mil spec tube.
Runs subs and supers suppressed and not just fine |
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Posted: 9/9/2015 3:12:07 PM EDT
[#34]
JPSCS with a Noveske 8.2" and full auto carrier suppressed and non-suppressed.
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Posted: 9/11/2015 9:11:41 AM EDT
[#35]
JP silent. Smooth as buttah, no issues at all.
Posted Via AR15.Com Mobile |
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Posted: 9/14/2015 11:54:32 PM EDT
[#36]
AAC 9" with Spikes ST-T2 buffer. Cycles sub- and super-sonics supressed and suppressed without issues. It might not be optimized for any single combo but I'm pleased.
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Posted: 9/16/2015 9:31:43 PM EDT
[#37]
I'm running the standard carbine buffer in my 10.5". Runs both subs and supers suppressed and unsuppressed perfect and ejects at 3-4. The bolt slapping is quite loud though.
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Posted: 9/17/2015 11:17:52 PM EDT
[#38]
I have a 9'' AAC, 8.5'' RF, and 10.5'' DSG all running a spikes st-t2 with zero issues so far, I'm pretty much only shooting suppressed (super and subs).
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Posted: 9/24/2015 8:11:01 AM EDT
[#39]
For you guys running a JPSCS, are you using the standard or heavy version?
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Posted: 9/24/2015 9:05:01 AM EDT
[#40]
Didn't see anyone mention my set-up, which is a LMT MRP .300 BLK for which I have both the 10.5" and a 16" MRP barrels. Lower wears a mil-spec buffer tube.
Intend to shoot suppressed only regardless of which barrel is installed ... I'm still waiting on the stamp for the can, an AAC SDN-6. For hiccup-free shooting/hunting while suppressed, what buffer and recoil-spring combination would you experts recommend for each barrel? FYI, for the 10.5 MRP barrel, it's been recommended to run the *standard* carbine spring with the *standard-weight* buffer. All input appreciated ... Thanks! |
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Posted: 9/24/2015 10:05:28 AM EDT
[#41]
Quote HistoryQuoted:
Not needed, but it's nice to tailor the gas setting to each load exactly rather than setting it up to just barely function with subs and still have more gas than is needed with supers. My 8" CMMG has just enough gas to function suppressed with 230gr subs at 1050fps (I know this because when I put my adjustable gas block on, even one click closed would stop it from locking back empty). Going from the subs to the 125gr supers I was able to close the gas block 10 clicks before the rifle would stop locking back empty. So I run it 8 clicks from full open now with supers (suppressed). Recoil is less, I get less gas blowback through the chamber suppressed, and I don't have cam pin recess wear anymore. Oh and to the OP... Keep in mind what buffer tube people are running when they tell you what weight they're using, because only the milspec buffer tubes are a standard length. The commercial carbine and pistol tubes vary and the spring preload change effects what buffer weight is needed. I have had to change buffer weights in several rifles when switching from commercial to milspec tubes. Usually the commercial tubes are about 3/4" longer and have a slanted end (all the milspec tubes I have seen have a 90 degree end). http://s3-us-west-2.amazonaws.com/thebangswitch/wp-content/uploads/2013/08/Buffertube_Specs.jpg Quote HistoryQuoted:
Quoted:
Quoted:
get adjustable gas block Not needed with 300 blk. It is not over gassed when suppressed as long as your gas port is the correct size. Not needed, but it's nice to tailor the gas setting to each load exactly rather than setting it up to just barely function with subs and still have more gas than is needed with supers. My 8" CMMG has just enough gas to function suppressed with 230gr subs at 1050fps (I know this because when I put my adjustable gas block on, even one click closed would stop it from locking back empty). Going from the subs to the 125gr supers I was able to close the gas block 10 clicks before the rifle would stop locking back empty. So I run it 8 clicks from full open now with supers (suppressed). Recoil is less, I get less gas blowback through the chamber suppressed, and I don't have cam pin recess wear anymore. Oh and to the OP... Keep in mind what buffer tube people are running when they tell you what weight they're using, because only the milspec buffer tubes are a standard length. The commercial carbine and pistol tubes vary and the spring preload change effects what buffer weight is needed. I have had to change buffer weights in several rifles when switching from commercial to milspec tubes. Usually the commercial tubes are about 3/4" longer and have a slanted end (all the milspec tubes I have seen have a 90 degree end). http://s3-us-west-2.amazonaws.com/thebangswitch/wp-content/uploads/2013/08/Buffertube_Specs.jpg I concur with this assessment. it's not needed but pistol length gas is stupidly over gassed with full house 110 and 125gn loads for me. Got a Govna gas block to make life nicer with the hotter stuff. My setup is 10.5" Noveski, 9mm buffer and comercial buffer extension. Gas port diameter is .081". Cycles subs un suppressed! So my Govna 2 port plate set up is .055" with supers and .081" for subs. |
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Posted: 9/25/2015 7:04:30 AM EDT
[#42]
Bumped for any .300 BLK MRP owners out there . . .
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Posted: 9/25/2015 10:38:42 AM EDT
[#43]
Quote HistoryQuoted:
For you guys running a JPSCS, are you using the standard or heavy version? Standard, subs only out of a 8.5" RF upper. Silky smooth. |
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Posted: 9/25/2015 1:32:18 PM EDT
[#44]
PSA 8.5" + Liberty Mystic X
super/subs standard carbine buffer and spring eats everything ive feed it so far (Gemtech, Detroit Ammo, PNW, Black hills) |
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Posted: 9/25/2015 3:34:15 PM EDT
[#45]
Quote HistoryQuoted:
PSA 8.5" + Liberty Mystic X super/subs standard carbine buffer and spring eats everything ive feed it so far (Gemtech, Detroit Ammo, PNW, Black hills) That's good to hear. I literally got my 8.5" PSA barrel back from ADCO this AM and I'll be using subs/supers and I've only got a standard carbine buffer for it ATM. |
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Posted: 9/25/2015 4:03:36 PM EDT
[#46]
Quote HistoryQuoted:
For you guys running a JPSCS, are you using the standard or heavy version? I am using the standard 556 version and it works great on my 8 inch 300 BO piston SBR build. I thought I might have to buy the spring pack but it ran on everything right out of the box |
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Posted: 9/26/2015 9:38:24 AM EDT
[#47]
Quote HistoryQuoted:
That's good to hear. I literally got my 8.5" PSA barrel back from ADCO this AM and I'll be using subs/supers and I've only got a standard carbine buffer for it ATM. Quote HistoryQuoted:
Quoted:
PSA 8.5" + Liberty Mystic X super/subs standard carbine buffer and spring eats everything ive feed it so far (Gemtech, Detroit Ammo, PNW, Black hills) That's good to hear. I literally got my 8.5" PSA barrel back from ADCO this AM and I'll be using subs/supers and I've only got a standard carbine buffer for it ATM. awesome. what work are you having done? |
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Posted: 9/26/2015 4:11:50 PM EDT
[#48]
Quote HistoryQuoted:
I am using the standard 556 version and it works great on my 8 inch 300 BO piston SBR build. I thought I might have to buy the spring pack but it ran on everything right out of the box Quote HistoryQuoted:
Quoted:
For you guys running a JPSCS, are you using the standard or heavy version? I am using the standard 556 version and it works great on my 8 inch 300 BO piston SBR build. I thought I might have to buy the spring pack but it ran on everything right out of the box Thanks, man. I noticed they have a heavy version that's supposed to be like a carbine action spring with H2 buffer. I'm thinking about getting a JPSCS for a .300Blk SBR build and was wondering which way to go. |
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