11.5 BCM possible buffer issues

[Animal_Mother556]

I know......I know....another 11.5 buffer question.

The problem is, it seems like everyone has luck with different weights:
"My 11.5 BCM has run perfectly with H"
"BCM specifically designed the 11.5 to run with standard buffers"
"I run an H2 and it is fine"


Anyway...when building my first AR with less than 16 inch barrel I decided to just split the difference and use an H buffer.

Just had her at the range to zero it and out of approximately 50 rounds, I had about 6 of these. Magazines were a mix of older pmags, new generation 20 round mags, and D&H GI mags. Ammo was Independence 55gr 5.56.

I've never seen this particular malfunction with an AR, but my gut says it is a buffer issue. Could it be a break-in issue?

[Animal_Mother556]

What I should have done was load one round in a bunch of mags and check for bolt lock. But I am dumb and forgot....

[C4IGrant]

That ammo sucks. Switch that out first and then try again.

Did you install the GB or did BCM?


C4

[Animal_Mother556]

Alright, I have some other 5.56 I can try.

BCM installed FSB, but I chopped it off pretty much as soon as ai got it. Chopped it without removing it from the gun, which I have done numerous times.

[MistWolf]

Extraction problem. Extractor is losing control of the empty before it can be ejected

[Animal_Mother556]

So, a heavier buffer to slow the bolt down?