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AAC 12.5" 300 BLK AR Barrel - Canadian Tactical Cowboy Supplies -

Advanced Armament Corporation

AAC 12.5" 300 BLK AR Barrel


This barrel assembly is all you need to convert your 5.56mm AR to 300 AAC BLACKOUT (7.62x35mm).

The 4150 steel barrel features a black nitride finish (including bore and chamber), 1:7" twist for super- or sub-sonic use. It comes ready for silencer use, threaded 5/8-24. Includes gas tube, steel low-profile press-fit set screw gas block (barrel has set-screw divots for gas block alignment).

Requires barrel nut - gunsmith installation is recommended.

  • Caliber: 300 BLK
  • Length: 12.5"
  • Finish: Black Nitride
  • Materials: 4150 Steel

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