QD Quick Detach Cam Lock Bipod Sling Adapter Mount for Picatinny Weaver Rail 20mm Bipod or Sling Swivel Airsoft or Paintball Quick detachable design with easy cam locking lever for fast installation and detachment Fits onto Weaver or Picatinny rails such as RAS, RIS rails 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 Fits all Standard 20 mm Picatinny Rail.