Ultimate Arms Gear Machined Aluminum Hook and Belt Sling/Strap Mount With Rifle Shotgun Weaver/Picatinny Mount Base Constructed Of Black Hard Anodized Aircraft Grade Aluminum - All Mounting Hardware Included. Allows The Use Of Standard Strap With Hooks And Or Cords. Standard Strap Swivel. Great For Rifles- Shotguns-Paintball & Airsoft With Picatinny System.