This Battle Arms Development 10.5" AR-15 9mm NATO Barrel is made out of 4150 chrome molly steel that has been double heat treated. The barrel features a proprietary tapered profile, 11 degree target crown, 1:10 6 groove button righthand twist rifling, with a QPQ nitride finish inside and out. The Muzzle is threaded at a 1/2in-36 thread pitch to prevent the accidently installation of a .22 caliber muzzle device.
Features and Specifications:
Material: 4150 Chrome Molly Steel
Inspection: Magnetic Particle Inspected
Rifling: 6 Groove Button Rifling
Finish: Salt Bath QPQ Nitride
Crown: 11 Degree Target Crown
Twist Rate: 1:10 Right-Hand Twist
Gas System: N/A
Muzzle Thread: 1/2"-36
Heat Treat: Double Heat Treat Stress Relieved
Made In U.S.A.