#html-body [data-pb-style=PRK83QL]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll;border-style:none;border-width:1px;border-radius:0;margin:0 0 10px;padding:10px}#html-body [data-pb-style=S0H9R49]{border-style:none;border-width:1px;border-radius:0;margin:0;padding:0}Barrel: 16" 4150V Chrome Moly Vanadium steel Freedom barrel, chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a Mid-length gas system. The barrel is finished with with a .750" 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 hard coat anodized black for durability. Featuring M4 feedramp cuts, these upper upper receivers are made for us right here in the USA. Bolt Carrier Group: Premium Nickel Boron coated BCG with a Milspec Carpenter 158 Bolt that has been shot peened, high pressure tested, and mag particle inspected. Gas key is hardened to USGI specs with grade 8 hardened fasteners and staked per Mil-Spec. Optics: Contains Magpul MBUS Front and Rear Sight set.