Luth-ar AR-15 Barrel Features The Luth-ar AR-15 Barrel is machined from 4150 chrome moly vanadium steel a proven alloy that balances strength and heat resistance for sustained firing. The button broached rifling process produces a consistent bore with six lands and grooves and the 1:7 right hand twist rate stabilizes heavier 5.56 projectiles commonly used in modern AR builds. A black phosphate finish coats the barrel for everyday corrosion protection while keeping the barrel s exterior low maintenance. The .750 gas block diameter matches common aftermarket gas blocks simplifying parts selection for a build. This carbine length barrel is threaded 1/2x28 at the muzzle letting the builder add a compensator flash hider or suppressor mount without additional machining. The M4 feed ramp cut ensures reliable feeding from magazines when paired with an M4 feed ramp upper receiver. At 11.5 inches this barrel suits a compact AR-15 pistol or SBR build where maneuverability matters. Weighing 1.6 lbs it is a lightweight addition for shooters building a nimble purpose-driven 5.56 rifle. Luth-AR AR-15 Barrel Specifications Manufacturer: Luth-AR Model: AR-15 Barrel Caliber: 5.56 Compatible Hosts: AR-15 Barrel Finish: Black Phosphate Barrel Material: Chrome Moly Vanadium Barrel Type: Carbine Length Twist Rate: 1:7 RH Gas Block Diameter: .750 Grooves: 6 Thread Pattern: 1/2x28 Barrel Description: Button Broached Barrel Length: 11.5 Weight: 1.6 lbs Available At: GrabAGun