MAX-OPS Single-Point Sling Adapter for M-4 Type A-R Platform Firearms provides for secure attachment of a single-point tactical sling utilizing an H-K type hook or similar device. The operator is able select the strong-side or weak-side sling position. The sling can be changed quickly to either side of the firearm. The MAX-OPS Sling Adapter is designed to replace the original factory lower receiver end-plate. Sling adapter Provides single mounting point for either side of firearm Accepts H-K type hooks - improves mobility of firearm Dark gray phosphate finish Guaranteed forever