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Posted: 3/10/2017 5:39:35 PM EDT
[#1]
This will go well
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Posted: 3/10/2017 5:40:39 PM EDT
[#2]
What barrel length, barrel profile, and what weight buffer?
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Posted: 3/10/2017 5:47:05 PM EDT
[#3]
Probably gonna have to move this to one of the full auto forums in the armory, and maybe provide bonafides or it'll get CoC'd.
If/when this gets relocated, I'll be happy to help. Basic immediate diagnosis is carrier bounce. <- former longtime 07/C2 |
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Posted: 3/10/2017 5:49:14 PM EDT
[#4]
Which buffer are you using?
Good chance your experiencing bolt bounce. |
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Posted: 3/10/2017 5:56:13 PM EDT
[#5]
Quote HistoryQuoted:
Which buffer are you using? Good chance your experiencing bolt bounce. +1 in case its a carbine ill just throw the things I do know out there for OP. The Colt 14.5 govt profile barrel requires the H buffer to run burst with full reliability. The Colt 14.5 HB (SOCOM profile) barrel requires the H2 buffer to run FA with full reliability. With both of these barrels, running a lighter buffer than these increases bolt bounce. And I don't know enough about tuning the 20" rifle to comment on that, but also willing to bet its bolt bounce regardless |
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Posted: 3/10/2017 6:21:44 PM EDT
[#6]
Tony K is another good one to help, he spends most of his time in the M16 discussion area.
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Posted: 3/10/2017 6:46:04 PM EDT
[#7]
Quote HistoryQuoted:
+1 in case its a carbine ill just throw the things I do know out there for OP. The Colt 14.5 govt profile barrel requires the H buffer to run burst with full reliability. The Colt 14.5 HB (SOCOM profile) barrel requires the H2 buffer to run FA with full reliability. With both of these barrels, running a lighter buffer than these increases bolt bounce. And I don't know enough about tuning the 20" rifle to comment on that, but also willing to bet its bolt bounce regardless Other combinations may work but those are what Colt use. |
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Posted: 3/10/2017 6:49:59 PM EDT
[#8]
Quote HistoryQuoted:
20" A2 profile barrels need the H6 buffer and 16" heavy profile barrels need the H3 buffer. Other combinations may work but those are what Colt use. Quote HistoryQuoted:
Quoted:
+1 in case its a carbine ill just throw the things I do know out there for OP. The Colt 14.5 govt profile barrel requires the H buffer to run burst with full reliability. The Colt 14.5 HB (SOCOM profile) barrel requires the H2 buffer to run FA with full reliability. With both of these barrels, running a lighter buffer than these increases bolt bounce. And I don't know enough about tuning the 20" rifle to comment on that, but also willing to bet its bolt bounce regardless Other combinations may work but those are what Colt use. Good info brother. I thought I remembered the carbine stock replacement for the A2 and A4 using an H6 buffer. Not sure what one would want to do if they got bolt bounce with an A2 stock and A2 buffer though (I guess maybe they wouldn't get bolt bounce? Not on burst anyway) 
ETA looks like if they did get bolt bounce with the rifle buffer, they could just replace one of the 5 steel weights with a tungsten weight. |
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Posted: 3/10/2017 8:29:25 PM EDT
[#9]
Do yourself a favor and just put the Vltor A5 receiver extension and buffer on it. No more musical buffers.
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Posted: 3/11/2017 2:41:50 AM EDT
[#10]
Thanks for all the replies I'll definitely try a heavier buffer and see if this gets corrected.
Thanks all for the help |
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Posted: 3/11/2017 12:55:33 PM EDT
[#11]
I've had hit and miss luck going with heavier buffers, but the 2-piece type always cures the bolt carrier bounce problem.
Edited to add: The old DPMS part number is BS-CWB. The new P/N is F620890. I doubt DPMS makes it....I imagine they buy it from someone else. 
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Posted: 3/11/2017 4:17:18 PM EDT
[#12]
Quote HistoryQuoted:
I've had hit and miss luck going with heavier buffers, but the 2-piece type always cures the bolt carrier bounce problem. I've used this in FA successfully with 5.56, 9 mm, and .45 ACP uppers. |
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Posted: 3/13/2017 9:01:40 AM EDT
[#13]
Thanks for the advice all. I have ordered an H3 buffer to see if i can get my gun to run
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Posted: 3/13/2017 9:14:23 AM EDT
[#14]
What do you mean by your snide comment Sir ?
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Posted: 3/13/2017 8:30:17 PM EDT
[#15]
Quote HistoryQuoted:
What do you mean by your snide comment Sir ? I would not even go there, snide remarks are the norm on this website. |
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Posted: 3/17/2017 10:02:25 PM EDT
[#16]
Quote HistoryQuoted:
Thanks for the advice all. I have ordered an H3 buffer to see if i can get my gun to run Edit: I suppose it's only been 4 days 
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Posted: 6/15/2017 11:15:24 AM EDT
[#17]
Quote HistoryQuoted:
Do yourself a favor and just put the Vltor A5 receiver extension and buffer on it. No more musical buffers. 
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Posted: 6/15/2017 11:50:14 AM EDT
[#18]
Everyone that owned an M16 that shot mine with the A5 on it . Had one on theirs the next time I would see them.
We even did a little test with 4 shooter's. IDPA target at 30 ft. 1 x 30 rnd mag. Dump mag on target . The A5 always put more hits on target then the stock buffer did. This was probably due to the ROF of the A5. |
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