UTG Integral 30mm Offset QD Mount, 4 Top Slots, 100mm Base Bi-directional Design-Offer Needed Offset in Diverse Applications; High Qlty. Synthetic Tape Applied on Rings Inter Surface for SCP & Mount Protection Robust and User Friendly Ergonomic Quick Detach/Lock Lever Fully Adjustable to Fit on Any Picatinny Rail Clever Posi-lock Crossbar Design and Spring Tension Controlled Locking Plate with Steel Insert Guarantees Most Secured Installation Tight Tolerance Control and Repeatable Positive Locking for Optimal Re-zero Adjustable Quick Detach Lever Lock System; Ring Top Picatinny Rail