LaRue Tactical Ultra-Low Mount Rings QD, LT719 The LT-719 rings are designed to lower your optic's centerline, close as possible to the rifle's bore. These 30mm rings allow for a perfect cheekweld, and attach to any MIL-STD-1913 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.