The Strike Multi Function End Plate (SI-AR-MFEP-ACN) modernizes the traditional castle nut and endplate system. It features an anti-rotation QD socket and sling loops for added functionality. Instead of relying on peening the castle nut for security, this design utilizes a set screw, allowing for easy upgrades and modifications to your build.Key FeaturesAnti-Rotation QD Socket: Provides a secure point for attaching slings.Set Screw Design: Eliminates the need for peening the castle nut, allowing for multiple rebuilds.Color: Finished in black for a sleek look.