10004954 Reviews & Ratings

AR-15 MK12 18" 5.56MM BARREL

The MK12 platform received fame for its use with US Special Operations groups as a semi-automatic precision rifle, and one of the essential elements of the platform is now offered as the Brownells 5.56 NATO MK12 Profile AR-15 barrel. The Brownells 5.56 NATO MK12 Profile AR-15 barrel are completely machined and finished by craftsmen in the USA and are made using stainless-steel bar stock that's 416-R certified steel and completely stress relieved. The barrels measure 18 inches long.

• Features 1:7 rate of twist
• Suppressor ready with 1/2x28 TPI threads
• Features 11-degree target crown
• Each barrel undergoes magnetic-particle inspection for quality

The Brownells 5.56 NATO MK12 Profile AR-15 barrel also features a complete nitride treatment, as well as precision machining for perfect suppressor compatibility.

See all of our AR15s and AR15 parts here.