The slide on, anodized aluminum ERGO Sling Swivel & mount allows shooters to mount a standard rifle sling to any 1913 Picatinny rail. 6061 T6 anodized aluminum rail mount with standard sling loop Attaches with integrated nylon tipped setscrew and jam screw Features a standard AR Sling Loop Includes allen wrench needed for installation Dual Use, compatible with rifles and shotguns Specifications Weight .12 lbs Dimensions 20 A- 2 A- 5 in