The Phase 5 Sloped QD AR-15 Receiver End Plate was designed to replace the standard AR15/M4 carbine end plate. While still meeting the requirements of the original design, the SQD-EP is lighter and QD Swivel compatible. FeaturesAccepts all push button QD swivels and QD slings.QD mount is at a 30 Degree angle from the lower receiver to allow a 360 Degree rotation for ambidextrous use.Lighter than the standard stamped steel receiver extension end plate (0.39 oz vs. 0.48 oz). Pull force rating= 200lbs