Barrel: 416R Stainless steel. Chambered in 223 Wylde, with a 1:7 twist, M4 barrel extension, and a rifle-length gas system. The barrel is finished off with a PSA 15" Lightweight M-Lok Free Float Rail, .750 gas block, and 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. Vortex Strike Eagle 1-8x24mm Gen 2 AR-BDC3 Reticle: Strike EagleA(R) riflescopes offer even more features in an updated body, making them ideal for value-minded shooters who need an optic that looks as good as it shoots. A true 1x on the low end adapts to a wide range of scenarios, letting shooters rapidly engage targets from point-blank to extended ranges. To maximize that versatility, you get a glass-etched, illuminated AR-BDC3 reticle, which aids in rapid shooting at near and far distances while providing holdover and ranging references from 0-650 yards. Plus, a thread-in throw lever helps you to set your magnification even faster, shot after shot. Features: The AR-BDC3 Reticle is improved for ranging distances and holdovers and illuminated for clarity in low light The Thread-In Throw Lever is for last and easy magnification adjustments Updated aesthetics for a clean, new look In the Box: Thread-in throw lever, CR2032 Battery, Reticle manual, flip caps, lens cloth, and product manual Fully Multi-Coated Waterproof Second Focal Plane Fogproof Glass Etched Reticle Shockproof Armortek Nitrogen Gas Purged