Zeadio ZBP-KCA Quick Detach QD Stud Cam Lock Bipod Sling Adapter Mount for 20mm Picatinny Weaver Rail Brand: Zeadio. Model: ZBP-KCA. Excellent choice for the bipods that mount onto standard sling stud. Fits all Standard 20mm Picatinny or Weaver Rail. 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.