PSA 16" Mid-Length Pencil 5.56 NATO 1:7 Nitride 13.5" Lightweight M-LOK Upper with Nickel Boron BCG, CH, & MBUS Sight Set - 5165450127

Barrel: 16" 4150V chrome moly vanadium steel, chambered in 5.56 NATO, with a 1/7 twist, M4 barrel extension, mid-length gas system and a light weight pencil profile. The barrel is nitride coated and finished off with an 0.625" diameter low profile gas block, PSA 13.5" Lightweight M-lok free float rail and an A2 flash hider. Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized. These uppers are made for us right here in the USA by a mil-spec manufacturer.  Bolt Carrier Group: ToolCraft nickel boron BCG has a bolt made of mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Includes: Magpul MBUS Sight Set, Black