My 11.5 Christmas Cheer barreled upper runs like a top with the A5. The unknown for me is how it would run suppressed, as I don't own a suppressor. It's been 100% with all sorts of different ammo, very controllable for a shorty. I haven't tried to run any steel cased ammo through it except for Hornady, which runs great in all my rifles.
Get out of my head man! I would be very curious to see how a suppressed 16" SR15 upper would do with the A5. I suspect that the A5 may add some measure of reliability across the spectrum of suppressed / unsuppressed with varying ammo. I think that could be the case because it's generally true with the A5 on a wide variety of barrel lengths and gas system lengths. Unfortunately I don't have a suppressor to test the theory. What buffer are you running on those setups with the A5?
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