LaRue Tactical Ultra-Low QD Scope Mount Rings 30mm Black. These 30mm rings allow for a perfect cheekweld and attach to any MIL-STD-1913 Picatinny rail. The LT719 positions the centerline of the optic 0.875" above the top of the rail. Specifications: Lowest QD scope mount LaRue manufactures LaRue Speed Levers provide outstanding return to zero the optic can be removed and replaced without worry Comes complete with QD adjustment wrench spare ring screw and Instructions. Specifications for LaRue Tactical Ultra-Low QD Scope Mount Rings: Manufacturer: LaRue Tactical Tube Diameter: 30 mm Quantity: 1 Condition: New Color: Black Package Contents: LaRue Tactical Ultra-Low QD Scope Mount Rings LaRue Tactical LT719: Ultra-Low QD Scope Mount Rings 30mm Black