Phase 5 Weapon Systems Inc Sloped Quick Disconnect End Plate Black. While still meeting the requirements of the original design the SQD-EP is lighter and QD Swivel compatible. Specifications for Phase 5 Weapon Systems Inc Sloped Quick Disconnect End Plate: Manufacturer: Phase 5 Weapon Systems Inc Fabric/Material: 7075-T6 Aluminum Hand: Ambidextrous Gun Make: AR Platform Gun Model: M4 AR-15 Condition: New Features of Phase 5 Weapon Systems Inc Sloped Quick Disconnect End Plate Proudly made in specialized factories from USA raw billet 7075-T6 aluminum Compatible with mil-spec carbine reciever extensions commercial-spec reciever extensions and all Phase 5 Pistol Buffer Tubes on nearly all AR15/M4/.308 AR Variant lower recievers. Accepts all push button QD swivels and QD slings. QD mount is at a 30 Degree angle from the lower reciever to allow a 360 Degree rotation for ambidextrious use. Lighter than the standard stamped steel reciever extention end plate (0.39 oz vs 0.48 oz. Package Contents: Phase 5 Weapon Systems Inc Sloped Quick Disconnect End Plate What firearm models does the manufacturer say Phase 5 Weapon Systems Inc Sloped Quick Disconnect End Plate is compatible with? The manufacturer suggests that Phase 5 Weapon Systems Inc Sloped Quick Disconnect End Plate is compatible with AR-15 M4Phase 5 Weapon Systems Inc SQD-EP: Sloped Quick Disconnect End Plate Black