*This Skeleton 80% lower receiver is machined to mil-spec tolerances. *The magwell on this 80 percent lower receiver is full broached for the perfect fit every time. *This is NOT a complete receiver and therefore not an FFL item. *Building your own AR-15? This 80 percent lower receiver is a great choice for any DIY gunsmith looking to build his or her own AR-15. *80 percent machined to mil-spec tolerances. You get to go hands-on with this lower, completing the machining for the fire control group, trigger pin, hammer pin, trigger slot, and safety selector hole yourself. *We hope you enjoy your build. Keep shopping rifle parts and AR-15 parts here to find an AR-15 jig kit and everything else you will need to complete your AR-15. *Machined to mil-spec tolerances *Forged from 7075-T6 aluminum *Black Anodized Profile ©