The Single Lever Tri-Loc mount was Developed by ARMS® for small pocket scopes and laser attachments for super compactness. Two (2) solid attachment feet on the right side are firmly held in place with A.R.M.S.® steel locking foot and lever on the left side. Standard STANAG width channel, allows secure laser or N.V. optic attachment at two points. Repeat Zero Hold with easy on and off.