Advanced Armament Co (AAC) AR-15 Barrel Assemblies are perfect for shooters who wish to build or convert an AR-15 to chamber the new 300 AAC Blackout (7.62x35mm) Round in order to take advantage of its unique ballistic characteristics. The barrels are finished inside and out with a highly durable and corrosion resistant Black Nitride, producing an extremely hard, slick surface on the steel that resists carbon adhesion to make for easier cleaning and maintenance. The Nitride process converts the steel's surface without any build-up, retaining all of the benefits of traditional chrome lining without suffering the accuracy degradation commonly encountered due to uneven application of chrome inside a barrel's bore. 

These barrels feature a 1 in 8" twist and are threaded 5/8"x24 at the muzzle for easy installation of flash hiders, muzzle brakes, and/or sound suppressors. A low profile steel gas block, pistol length gas tube and thread protector are included. The Pistol Length Gas Port location makes this barrel optimal for use with Subsonic loads, either Suppressed or Unsuppressed, as well as suitable for use with Supersonic ammunition. Requires barrel nut for installation (not included). 

Technical Information:

• Barrel Length: 9"
• Material: 4150 Chrome Moly Vanadium Steel
• Finish: Black Nitride
• Twist Rate: 1 in 8"
• Chamber: 300 AAC Blackout (7.62x35mm)
• M4 Feed Ramps: Yes
• Gas Port Location: Pistol
• Barrel Diameter at Gas Port: 0.750"
• Muzzle Thread Pattern: 5/8"-24
• Extras: Low Profile Gas Block, Gas Tube, Thread Protector
• Designed for use with Subsonic loads, either Suppressed or Unsuppressed
• Also suitable for use with Supersonic ammunition