PSA 16" CARBINE-LENGTH M4 5.56 NATO 1/7 NITRIDE MOE EPT RIFLE KIT & REAR MBUS - 516447449

Barrel: Nitride finished 4150V chrome moly vanadium 16" barrel. Chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a carbine-length gas system. this M4 barrel is is finished off with Magpul MOE carbine-length handguards, F-Marked gas sight base, and A2 flash hider. Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized for durability. These uppers are made for us right here in the USA by a mil-spec manufacturer. Bolt: Full-auto profile bolt carrier group. Milspec Carpenter No. 158® steel bolt, Shot Peened, High pressure tested, Mag particle inspected,  Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec.  8620 steel M-16 profile carrier is chrome lined and phosphate coated. Build Kit: PSA EPT MOE Lower Build Kit Includes Magpul MOE Stock,  Pistol grip, and trigger guard, Palmetto State Armory EPT  Lower Parts Kit and Mil-Spec diameter 6-position buffer tube assembly. EPT Lower parts kit upgrades the standard combat-style fire control group with a single-stage, target-style,  fire control group with polished contact surfaces and a electroless nickel coating. Everything you need to finish your stripped lower! Includes: Magpul® MBUS Rear Sight, Black