H2 buffer

[BoppaBear]

Ordered an H2 for my 14.5" middy (pinned comp for 16..." OAL). I'll be running the rifle in a course next month, but will be going out to check zero on the rifle (new barrel and comp) and function, prior to the course.

The pre-course sessions will be slow fire due to local range restrictions. Anything I should look for as far as reliability issues? Obviously FTE's are one, as is failure to lock the bolt back. How about weak or erratic ejections?

The gun smith shot the rifle after putting on the new barrel and pinning/welding the comp, and it locked back fine.

[ffhounddog]

On the Rifle, just make sure that it is locking back with the ammo you are planning to use. Also just make sure it runs well for a few rounds and to confirm zero. Lube is your friend.

[ST911]

Depends on how much gas it's getting. You may find that a mid-length with lighter .223 ammo is dangerously close to functional threshold with H and H2 buffers. Test firing for function is a good idea. Try to do so when the gun is hot, dirty, and lube is starting to burn off.

[BoppaBear]

Thanks guys. I definitely intend to test it some, and will take the standard buffer with me to the class also.

I've got an H on the way too, just to play around with the different set-ups.

[joshs]

Depending on the ammo you plan on using, you may need a carbine buffer due to the reduced dwell of the 14.5 mid-length.


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[BoppaBear]

Depending on the ammo you plan on using, you may need a carbine buffer due to the reduced dwell of the 14.5 mid-length.


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Thanks for the heads up. I'll be running lower power ammo (55gr primarily for range and courses), which may cause issues. I have someone that wants the H2 if it doesn't run in my rifle properly. I've got 62 gr, but it's M855, and ranges in my areas won't allow it.

I'm relatively new to ARs, so I'm just trying to figure out what makes mine run and not run, and maybe run a little better. The buffer in the rifle has less than 700 rounds through it, so I'll definitely hold onto that one just in case.

At the end of the day, changing up the buffers is pure curiosity on my part. The rifle runs well as is. I'm just curious. If the H and H2 both work, then I'll have back-up buffers if needed in the future.

[TGS]

My 14.5" BCM Middy with an H buffer will not reliably run low power ammo (power levels you find with the Russian stuff). I see no reason for the H2 with a Middy, it's kinda just overcompensating the buffer system for no real benefit while asking for trouble.

If you were going to run an H2, I'd stick to quality 5.56 rounds. I had a buddy who could get away with an H3 on his middy, but just because you can doesn't mean you should, ya know? No point in operating the weapon on the cusp of functionality.

[Clusterfrack]

My BCM 14.5" mid runs well with an H buffer and yields a perfect ejection pattern (see below) using 5.56 pressure loads. Suppressed, the same upper runs well with an H2 or H3. I don't see the point of going with a heavier buffer than needed.

[rob_s]

My BCM 14.5" mid runs well with an H buffer and yields a perfect ejection pattern (see below) using 5.56 pressure loads. Suppressed, the same upper runs well with an H2 or H3. I don't see the point of going with a heavier buffer than needed.

Don't do that. That graphic is as useless as this one

[Jay Cunningham]

Don't do that. That graphic is as useless as this one

Agreed. There's no "mil-spec" ejection angle in the TDP.

lolz