The Stripped POF-USA Gen4 P415 lower only requires a mil-spec parts kit to be completed. All proprietary and ambidextrous controls are already installed on the lower. - POF GEN 4 P415 STRIPPED LOWER - 7075 BILLET LOWER - ENHANCED BOLT CATCH - OVERSIZED INTEGRATED TRIGGER GUARD - AMBIDEXTROUS BOLT CATCH IN TRIGGER GUARD - AMBIDEXTROUS MAG RELEASE - AMBIDEXTROUS BOLT RELEASE - NYLON TENSION SCREWS - Burnt Bronze Cerakote over MIL-A-8625F Type III Class 2 Flat Black Hard Anodize. - WEIGHT: 10 oz