UTG Integral 1" Med-pro QD Ring Mount,2 Top Slots,130mm Base Ergonomic QD Lever Lock Fully Adjustable to Fit on Any Picatinny Rail, Tight Tolerance Control and Repeatable Positive Locking for Optimal Re-zero 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 1" Rings with High Quality Synthetic Tape on Ring Inner Surface for Scope and Mount Protection Ring Tops with Integral 1-slot Picatinny Rail for Flexible Mounting of Alternate Quick-aim Sight or Other Accessories