FN15 16 inch Carbine Upper Assembly

Complete upper assembly includes, bolt carrier group and charging handle. Barrel cold hammer forged. Proprietary CrMoV barrel steel. Hard-chrome lines to mil-std 171. M4 feed ramps. High pressure tested. Magnetic particle inspected. Manganese phosphate finish. Chambered in 5.56x45mm. 1:7 RH twist. Bolt carrier group/ bolt. M16 auto bold carrier assembly. Carpenter 158 bolt ( magnetic particle inspected). Staked gas key.