Fits onto Weaver or Picatinny rails such as RAS, RIS rails Quick detachable design with easy cam locking lever for fast installation and detachment Rotatable sling stud built in is perfect for mounting bipods or attaching to sling swivels Works great with Harris bipods or any other bipods that mount onto standard sling stud Adapter body is made of aluminum alloy. Stud is made of steel Anodized in matte black finish Length of adapter: 2inch Weight: 2.6oz