AIM Sports Inc Sling Rail Mount W/Quick Release Swing Swivel Black Small. The AIM Sports Sling Rail Mount w/ QR Swing Swivel is built of rugged aircraft aluminum with a durable black anodized finish to provide years of good looks and great service. Specifications for AIM Sports Sling Rail Mount w/ QR Swing Swivel: Length: 2" Weight: 1.7 oz. Features of AIM Sports Inc Sling Rail Mount W/Quick Release Swing Swivel Black anodized aircraft grade aluminum Quick detach / swing swivel Mounts to all standard Weaver / Picatinny 1913 rails Package Contents: AIM Sports Inc Sling Rail Mount W/Quick Release Swing Swivel AIM Sports Inc MT029: Sling Rail Mount W/Quick Release Swing Swivel Black Small