300 BLACKOUT AR15 Barrel 

The 300 Blackout (300 AAC Blackout) is an extraordinarily versatile round as should be expected since it was developed by the US Advanced Armament Corp. as an upgrade to the 5.56 NATO.  A key improvement was fast burning powder that eliminates the unburned powder flash.  A twist rate of 1x7 will stabilize all factory loads, but a 1x8 twist will improve accuracy for lighter projectiles - we offer both. 300 Blackout will operate either supersonic for long range application, or subsonic and suppressed for close quarters engagements.

AR15Parts.com barrels are sourced from top US manufacturers including Ballistic Advantage, Shaw Barrels, Swan Machine, Wilson Arms, Wilson Combat, ZRO Delta, and others.

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