When you want to start your AR build, the Cornerstone lower is the starting point. It is machined from forged 7075-T6 aluminum to tighter than Mil-Spec tolerance with nylon tipped tensioning screw to ensure the solid fit between upper and lower. It features a flared mag well, pictogram safe and fire indicators, chevrons on the front of the mag well, and the distinctive Grey Ghost markings. The lower functions with nearly all available AR parts kits and uppers. NOTE: Requires a lower parts kit, buffer & stock of your choosing to complete. Brand Grey Ghost Precision Category Lowers Gun Platform AR-Style Caliber Multi-Caliber Model Cornerstone Series Lower Type Stripped Firearm Fit AR-Platform Receiver Finish Black Anodized Receiver Material 7075-T6 Aluminum Weight 0.50 oz Similar Items LOWER Search Code GGP