Warne Skyline Precision Sling Swivel Rail. Mount bipods and other accessories and maintain an attachment point for your sling. Installs and removes easily. Specifications for Warne Skyline Precision Sling Swivel Accessory Rail: Manufacturer: Warne Color: Black Height: 0.5 in Length: 3.5 in Included Accessories: Allen Key Mounting Hardware Condition: New Package Contents: Warne Skyline Precision Sling Swivel Accessory Rail Warne 7953M: Skyline Precision Sling Swivel Rail