The .300 Blackout offers compatibility with standard AR-15 magazines, upper receivers, bolt carrier groups, and a number of other commonly found components. Due to widespread availability of subsonic factory ammunition and a cartridge designed around suppressed use, the .300 Blackout has established itself as one of the most efficient suppressed cartridges currently on the market.
Criterion has partnered with Midwest Industries to bring you this .300 AAC Blackout barrel model. This stainless steel barrel features a 1-8 twist and a M4 barrel extension. 5/8-24 muzzle threads allow for compatibility with a number of muzzle devices and sound suppressors. Chambers are finished, but barrels should be headspaced and installed by a qualified gunsmith.