PSA 16" 5.56 NATO M4 Carbine Classic Rifle Kit, Flat Dark Earth – 516446389

Barrel: 4150V Chrome Moly steel barrel chambered in 5.56 NATO with a 1:7 twist rate, M4 barrel extension, and a carbine-length gas system. The barrel is finished off with a standard carbine flat dark earth handguard, F-Marked gas sight base, and A2 flash hider.
Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized, features a forged upper receiver. 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. 158A(R) steel bolt. 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.
Lower Build Kit: Includes Classic Flat Dark Earth M4-Style Stock, Flat Dark Earth A2 Pistol grip, Classic Lower Parts Kit and Mil-Spec diameter 6-position buffer tube assembly. Everything you need to finish your stripped lower!