1. AR platforms Ball Head Mount Adapter is suitable for Arca standard base dovetail, compatible with Arca tripod ball heads 2. Mlok style aluminum material, By using the SMP-80, can mount a ride on tripod for stable shooting experience. 3. Two slot Mlok interface RRS/ARCA, length, max: 80 mm/3.15 in. 4.When you shoot. The Mlok guide rail on the upper tripod is connected to the hand guard. More stable shooting. 5. Elaborately CNC machined, Screw and T-shaped screw are stainless steel. If you have any questions, please contact us first. Smp-80 M Lock Arc Mount, Mlok And Arc Attachments And Clamps Matching, 3.15 Inch Mlok Arca Rail Mount Adapter Accessories