PSA 16" M4 Premium Upper - with BCG, Charging Handle, and PSA Aluminum Rear Flip Up Sight

Barrel: 16" Chrome-lined, chrome moly vanadium. Chambered in 5.56 NATO, with a 1/7 twist, M4 barrel extension, and a carbine-length gas system. The M4 profile barrel is high pressure tested and magnetic particle inspected and then phosphate coated. Barrel is finished off with an .750" diameter F-marked front sight base with sling swivel, standard handguards and an A2 flash hider. Barrel is made for us right here in SC by FN Manufacturing. Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feedramp cuts, T-marks, these upper upper receivers are made for us right here in the USA. Bolt Carrier Group: M16 Full Auto Profile Bolt Carrier Group with Carpenter 158 Steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Full-auto profile bolt carrier is parkerized outside, and chrome lined inside. Sight: PSA Aluminum Flip up rear sight. American made. Dual aperture rear sight with windage adjustment. Mounts to pictinny rail. Each upper is assembled to order with US-made parts, and test fired to check gas function. Quick Overview: 16" Barrel length Chrome moly vanadium barrel 5.56 Nato Chamber 1 in 7" twist rate Chrome-lined bore HPT/MPI Barrel M4 Feed ramps F-Marked Front sight post A2 Flash Hider Sling Loop Standard Hand Guards w/ heat shields Forged upper receiver T-Marks M16 Bolt Carrier Group and Charging Handle PSA Aluminium Rear Flip Up Sight