All steel 30mm ring, secured with A.R.M.S.® Dovetail system to an extruded aluminum platform.
The New MK-II Lever® features a built-in precision adjustment wheel allowing finger tip (no tool) selection to desired tension to fit variations in 1913 Mil-Std Dimensions. The mounts adjustment wheel comes pre-gauged and locked to the center of the Mil-Std dovetail specs. Quick Detach Throw Lever® Mil-Std 1913 Rail MK-II Lever® mounting attachment.
U.S. Pat. No. 8,112,933 B1