Strike Industries Multi-Function End Plate w/ Anti-Rotation Castle Nut Black One Size. These AR15 Lower Parts by Strike Industries provide anti-rotate QD sockets or sling loops specifically designed to work together by setting a screw to secure the endplate to the castle nut allowing for multiple uses as you upgrade or update your build. The Strike Industries Endplate System is reversible with three integrated sling mounting options for a variety of carry options. Don't just replace your old system upgrade it with the Strike Industries QD End Plate and Castle Nut. Specifications for Strike Industries Multi-Function End Plate / Anti-Rotation Castle Nut: Manufacturer: Strike Industries Color: Black Condition: New Features of Strike Industries Multi-Function End Plate and Anti-Rotation Castle Nut Set screw to retain takedown pin and detent for ease of installation No peening or staking needed with the AntiRotation Castle Nut/End Plate design Antirotate QD socket Multiple sling attachment points Package Contents: Strike Industries Multi-Function End Plate and Anti-Rotation Castle Nut 1x Multi Function Endplate 1x AntiRotation Castle Nut 1x Detent Set Screw (1.5MM HEX not included) 1x AntiRotation Set Screw (1.5MM HEX not included) 1x Warning card Strike Industries SI-AR-MFEP&ACN: Multi-Function End Plate w/ Anti-Rotation Castle Nut Black One Size