The Yankee Hill Machine Hand Stop easily mounts on M-LokA(R) rails including YHM BLACK DIAMOND and MR7 series to provide excellent weapon control.The textured front side is for superior traction on barriers and obstacles. The unit allows the use of a Q.D. Sling Swivel (YHM-9466) from either side. Also allows the use of Clip or Safety Lock Slings on the front slot. Made from hardcoat anodized 6061-T6 aluminum. Includes all mounting hardware. Requires 1/8" Hex Allen Wrench to install. Features6061-T6 AluminumMil-Spec Hardcoat AnodizedHeight off the hand guard: 1 1/4"Accepts Q.D. Sling Swivel on either sideAccepts Clip or Safety Lock slings on the front slotCan be mounted on the hand guard in reverse, as a barricade support