This Battle Arms Development 16" AR-15 300BLK 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, 1:8 5R righthand twist rifling, a carbine length gas system with a journal length of .750in, and a QPQ nitride finish inside and out. The Muzzle is threaded at a 5/8inx24.
Features and Specifications:
Material: 4150 Chrome Molly Steel
Inspection: Magnetic Particle Inspected
Rifling: 5R Rifling
Finish: Salt Bath QPQ Nitride
Crown: 11 Degree Target Crown
Twist Rate: 1:8 Right-Hand Twist
Gas System: Carbine Length
Gas Journal Diameter: .750in
Gas Block Journal Length: 1.1in
Gas Port Diameter: 0.119"
Barrel Extension: M4
Muzzle Thread: 5/8"-24
Weight: 1 lb 12.7oz.
Heat Treat: Double Heat Treat Stress Relieved
Made In U.S.A.