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2/2/2014 12:55:45 PM EDT
I recently built a 300blk upper, Rainier match 16'' with carbine gas system and a Battle Comp. When I test fired it I used a lower with a Colt H-3 buffer. I fired Remington factory 220gr ammo. It cycled flawlessly. Fast forward to yesterday. I ended up building a Spike's lower with a standard buffer. I had several out of battery issues and failures to lock the bolt on the last round. I was using the same mag I originally used to test fire the upper. I am guessing this is from a lighter mass buffer. I haven't had a chance to shoot again and won't for at least a week. Hive thoughts? Anyone had this issue before?
 
2/2/2014 4:52:44 PM EDT
[#1]
I am running a carbine length system with a standard buffer. So far I have not had problems.  Were you using the same ammo? If so then I would say try the H2 buffer.
I have run the 208 Ozark Ordnance subsonic with no problems.
2/2/2014 6:41:16 PM EDT
[#2]

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Quoted:


I am running a carbine length system with a standard buffer. So far I have not had problems.  Were you using the same ammo? If so then I would say try the H2 buffer.

I have run the 208 Ozark Ordnance subsonic with no problems.
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Same ammo from from the same box.

 
2/3/2014 6:29:44 AM EDT
[#3]
I run a carbine buffer but with a pistol gas system and never had any problems with it, I'm guessing the carbine has is giving you trouble. I would try it with a carbine buffer though and see if that helps
2/3/2014 6:55:46 AM EDT
[#4]
I run a standard carbine buffer with my 16", but I know many guys run a Spikes T2, as it is heavier than an H and not as heavy as an H2.  It could also be your spring, do you run the standard or a different upgraded one?
2/3/2014 3:41:52 PM EDT
[#5]

Quote History
Quoted:


I run a standard carbine buffer with my 16", but I know many guys run a Spikes T2, as it is heavier than an H and not as heavy as an H2.  It could also be your spring, do you run the standard or a different upgraded one?
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It's a standard ptac lower kit.

 
2/3/2014 4:11:15 PM EDT
[#6]
I tried running the T2 buffer and it just wouldn't run reliably. I switched to standard carbine buffer and no problems since.

Quote History
Quoted:
I run a standard carbine buffer with my 16", but I know many guys run a Spikes T2, as it is heavier than an H and not as heavy as an H2.  It could also be your spring, do you run the standard or a different upgraded one?
View Quote

2/3/2014 4:58:14 PM EDT
[#7]



Quote History
Quoted:




I run a standard carbine buffer with my 16", but I know many guys run a Spikes T2, as it is heavier than an H and not as heavy as an H2.  It could also be your spring, do you run the standard or a different upgraded one?
View Quote
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