UTG Integral 30mm Med-pro QD Mount, 2 Top Slots, 120mm Base 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 High Quality Synthetic Tape Applied on Rings Internal Surface for Scope and Mount Protection Adjustable Quick Detach Lever Lock System, Ring Top Picatinny Rail