PSA MOE EPT Pistol Lower Build Kit is a high quality lower parts kit designed to convert an AR-15 lower into a pistol. It features Enhanced Polished Trigger (EPT), Magpul grip, Magpul Trigger Guard, and black oxide coated hammer and trigger springs. The kit also includes castle nut, latch plate, carbine buffer spring, a 5-position mil-spec buffer tube, and a standard carbine buffer. What’s Included provides a complete set of components to assemble a functional AR pistol lower, including fire control group, buffer tube assembly, takedown/pivot pins, bolt catch, magazine catch, and safety selector assemblies.