The GroveTec Tri-Base Buffer Tube Sling Mount mounts on a mil-spec buffer tube to allow for three sling mounting positions. Installs with no dis-assembly required. All three bases are full rotation. Allen key tool and mounting screws included.FeaturesNo Disassembly of firearm Required for InstallationFits Mil-Spec AR-15 Buffer Tubes1/2" thick3 SLING Mounting Positions6061 Aluminum ConstructionType III Black Hard Anodized Finished