Warthog's design is inspired by the A-10 Warthog aircraft and is also perfect for the hog hunter that wants to stand out. The Warthog - Gen2 features now include a threaded bolt catch pin, reduced weight and improved styling - and lower costs to you. FeaturesAn oversized integral trigger guardA heavily beveled magazine flare that helps you load as quickly and efficiently as possibleMachined 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 GI standard issue magazines as well as PMagsMulti caliber mark