The A.R.M.S.® #72®Ext-MK-II® mount 5.56 Cal. features a built in harmonic spring dampener system that significantly reduces damaging shock waves, allowing sensitive electro/optic aiming devices to better survive, high volume firing on all caliber man portable and crew served weaponry. 100% MADE IN THE USA.

The #72®Ext. mount also includes the new MK-II® Levers, which feature a built in precision adjustment wheel allowing finger tip (no tool) selection to desired tension to fit variations in 1913 mil-standard dimensions. Precision tension means Precision accuracy. The mounts adjustment wheel comes pre-gauged and locked to the center of the mil std. dovetail specs. The hash marks to the left or right of the adjustment wheels white marked indicator line, represent .002.