Optimize your AR-15 with the BattleHawk Armory upper receiver, chambered in 5.56 NATO for versatile performance in tactical and sporting applications. This upper features a lightweight 16" 4150 Chrome Moly Vanadium pencil profile barrel with a 1:8" twist rate and 1/2"x28 TPI threading, ensuring accuracy and reduced weight. The carbine-length gas system with a .750" gas port and fixed gas block provides reliable operation. A 15" M-Lok handguard includes 8 slots at the 3 and 9 o'clock positions, 7 slots at the 6 o'clock position, and a full-length Picatinny top rail for flexible accessory mounting. Equipped with a dust cover, forward assist, and a 3-slot muzzle brake to control recoil, this upper is ideal for your custom build. Shop now at BattleHawk Armory to complete your rifle! Specifications: Barrel Length: 16" Caliber: 5.56mm NATO Handguard: 15" M-Lok Gas System: Carbine Length Twist: 1:8" Barrel Profile: Pencil Dust Cover Muzzle Device: Brake Muzzle Device: 3-Slot Brake Fixed Gas Block Forward Assist