The Ballistic Advantage AR15 Enhanced Set Receiver delivers billet aesthetics in a forged package. This custom designed enhanced forging is machined from 7075-T6 Aluminum and compatible with all mil-spec AR15 parts. Aside from the visual upgrades this custom engineered design provides that challenge much more expensive billet options, we have added several functional features to the lower receiver to simplify the assembly process for the at home builder.SpecificationsMaterial: Machined from 7075-T6 forged aluminumFinish: Matte black hard-coat anodized mil-spec 8625 Type 3 Class 2Markings: Cal MultiCompatibility: Works with standard AR15 components and magazinesWeight: 8.61ozBallistic Advantage AR15 Enhanced Lower Receiver Improvements:Threaded Bolt Catch Roll Pin - Allows for simple installation of the bolt catch and virtually eliminates the chance to damage the finish during installation (pin included). 1/16" Hex Key required for assembly.Integrated Trigger Guard - Eliminates the possibility of breaking... More