Want to build your own upper? Do you have an extra upper you need a lower receiver for? YHM is proud to offer our completely assembled lower receiver that is ready for the range out of the box. Simply pull out the takedown pins insert your upper receiver and start loading magazines. - These lowers were designed and are MACHINED 100% IN HOUSE - Made from 7075-T6 aircraft grade aluminum (Forged) - Features over sized magazine well chamfers for easier magazine changes - Accepts All Generations of PMAG's - Accepts Mil-Spec Upper receivers - Fits all standard parts - Hardcoat Anodized matte black to Military Specifications or better - These come pre-assembled with a complete lower parts kit and adjustable (6 Position) commercial carbine stock installed. - Features a standard A2 black pistol grip