The Sharps Bros Badlands AR-15 Stripped Lower Receiver features now include a threaded bolt catch pin, reduced weight and improved styling - and lower costs to you. FeaturesMachined top to bottom from 7075-T6 aluminum, a peak-strength corrosion-resistant aluminum alloyA hard coat anodize finish per MIL-A-8625, the anodizing model for model for most military and aerospace productsFull compatibility with all mil-spec internal partsFull compatibility with all other aftermarket mil-spec upper receiversFull compatibility with PMags, Hex mags and other standard capacity magazinesMulti caliber mark