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Can this be used with .300 blackout — 2 Answers
by Justfree624, from GA, United States Asked on February 16, 2020
It should work with 300 Blk. Maybe a possibility of a issue with some UNsuppressed Sub-Sonic loads... MAYBE. It’s basically a increased mass carrier with a cut back single fastener gas key and shortened buffer to get a longer stroke with the heavier mass essentially getting the gun closer to the “constant recoil” principal.
It may possibly work but the 300 blk round is very low pressure and this is designed for a high pressure round. If anything you'd want a lightweight BCG for 300 blackout with a light buffer weight to ensure proper cycling for subsonic rounds both suppressed and unsuppressed. I personally wouldn't use this for 300 blackout.