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Product Info for FN America AR-15 Hammer Forged 16 Inch Barrel Carbine Length Gas System 5.56mm NATO 36421

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.image

Specifications for FNH USA AR-15 Hammer Forged 16 Inch Barrel Carbine Length Gas System 5.56mm NATO 36421:

Mfg Item Num:  36421
Type:  BARRELS - RIFLE
Barrel Length:  16
Caliber:  5.56mm NATO
Caliber-Gauge:  .223 REM.
Model Header:  Carbine Length Gas System
Master Model Header:  AR-15 Hammer Forged Barrels