Luth-AR AR-15 Barrel Features The Luth-AR Lightweight Barrel is machined from 4150 Chrome Moly Vanadium steel a material chosen for its strength and heat resistance under sustained firing. A government profile contour keeps the barrel robust while still fitting standard AR-15 handguards and gas systems. The 1:7 twist rate is well suited to heavier 5.56 NATO bullet weights giving shooters flexibility to run a range of loads from lightweight varmint rounds to heavier longer range projectiles. An M4 barrel extension completes the barrel s compatibility with standard AR-15 upper receivers. Finished in a manganese phosphate coating the barrel resists corrosion and wear while maintaining a low glare black appearance suited to duty and range use alike. The barrel s 1/2x28 thread pitch accepts standard muzzle devices compensators and suppressors though it ships without a front sight post spring or detent. At 11.5 inches this barrel is ideal for a compact AR-15 build that favors maneuverability without sacrificing reliability. Backed by Luth-AR s reputation for quality AR components this Lightweight Barrel is a solid foundation for any short barreled 5.56 build. Luth-AR AR-15 Barrel Specifications Manufacturer: Luth-AR Model: Lightweight Barrel Caliber: 5.56 NATO Barrel Length: 11.5 Barrel Description: Government Profile Barrel Material: Chrome Moly Vanadium Barrel Finish: Manganese Phosphate Twist Rate: 1:7 Thread Pitch: 1/2x28 Color: Black Barrel Extension: M4 Available At: GrabAGun