CMMG Barrel AR-15 Pistol 300 AAC Blackout (7.62x35mm) 1 in 7" Twist 8.0" Pistol Gas Port Chrome Moly Matte

Product #: 118276 CMMG #: 30D810A UPC #: 815835016283
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  • Information

The CMMG 300 AAC Blackout Barrel features 1 in 7" twist rifling and a pistol length gas system. The muzzle is threaded 5/8"-24 for use with muzzle brakes, flash suppressors, or sound suppressors. Gas block and gas tube not included.


CMMG's durable salt bath nitride finish is a unique protective coating applied to the barrel that surface-hardens the metal, extending barrel service life by reducing friction in the bore and lessening bore surface wear. This treatment produces an extremely hard, slick surface on steel that resists carbon adhesion and increases corrosion resistance, making for easier cleaning and maintenance. Nitriding converts the steel's surface without any build-up, retaining all the benefits of traditional chrome lining without suffering from the accuracy degradation commonly encountered due to uneven application of chrome inside the barrel's bore.

Technical Information:

  • Length:  8.0"
  • Material:  Chrome Moly Steel
  • Contour:  Medium
  • Chamber:  300 AAC Blackout
  • Twist Rate:  1 in 7"
  • Chrome Lined:  No
  • Finish: Salt Bath Nitride
  • M4 Feed Ramps:  Yes
  • Muzzle Thread Pattern:  5/8"-24
  • Gas Port Location:  Pistol
  • Exterior Diameter at Gas Port:  0.750"


Please Note: An “AR-15 Pistol” barrel is less than 16” in length. Pistol barrels are only for use on AR-15 pistol lowers and legal Short-Barreled Rifles. Other configurations may violate Federal law.

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