FN AR-15 Hammer Forged Barrel 16 Inch Barrel Carbine Length Gas System 5.56mm NATO

Chrome lined chamber and bore. Hammer forged from proprietary Chrome Moly Venadium (CMV) steel. This is the same steel developed for our Machine Gun barrels designed to handle the punishment of full-auto fire now available to you in our AR-15 barrels. Magnetic Particle (MP) tested to ensure each barrel is free of microstresses and/or cracks. Government Profile, built for .750 inch diameter gas block, ½ x 28 inch threaded muzzle. M4-style feed ramp and barrel extension for consistent and reliable feeding. Manganese Phosphate barrel finish. 1:7 inch right hand twist rate.