16" Match M4 Military Contour Barrel Description: * 6 groove, 1x9 Right-Hand Twist * Button Rifled * Manganese Phosphated * Threaded Muzzle * 4150 CMV (chrome-moly vanadium) Steel * Chambered in 5.56 NATO

Precision 4150 CMV barrel with NIB M4 cut extension, chambered 5.56 NATO, pulled-button rifling process, lapped bore, polished chamber and 11º crowned barrel delivers pinpoint accuracy. Each barrel is concentrically cut and muzzle threaded ½ -28 R.H. twist to accept flash hiders/suppressors, stressed relieved, turned on center to prevent accuracy robbing distortion when the barrel heats up, and hardened to 26-33 Rc giving the barrel a long life. Exterior includes detailed contouring, rich dark black manganese phosphate finish (parkerized), and oil.