Barrel: 4150V Chrome Moly steel. Chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a carbine-length gas system. The barrel is finished off with a standard 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. 158® 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 M4-Style Stock, A2 Pistol grip, Classic Lower Parts Kit and Mil-Spec diameter 6-position buffer tube assembly. Everything you need to finish your stripped lower.

Vortex Strikefire II Red/Green Dot: When situations demand split-second target acquisition and maximum field of view, mount up the StrikeFire II and shoot both eyes open. Feature-rich, versatile and reliable, the StrikeFire II is a great choice for shooters who want a quality red dot sight, but don't want to break the bank. Features sleek rear-facing controls for power on/off and easy adjustment of ten dot intensity levels lowest two settings are night-vision compatible. Automatically returns to the last dot intensity used when powered up. The 30mm aluminum alloy chassis provides extra-high recoil rating and is waterproof and fog proof. Strike fast!