AR-15 upper and lower receivers form the core of a USPSA Multigun, 3-Gun, or PCC-adjacent rifle build. Competitors rely on tight-fitting, precision-machined receivers for zero-rattle accuracy, with extended ejection ports and integrated features that suit match use. Product types include stripped uppers, stripped lowers, and complete upper and lower assemblies, in forged and billet construction, and compatible with mil-spec AR-15 parts and your choice of barrel, bolt carrier, and trigger. Fast same-day shipping on most orders at Shooters Connection.