NSN 5855-01-300-7424. Designed much like the A.R.M.S.® #19A, without the STANAG or male Weaver capability on the top surface. The top surface is machined to fit the AN/PVS-4 N.V. Scopes. Top surface can be tailored machined to fit other optic bottom surfaces. Fits all Mil-spec. dovetail A.R.M.S.® Rails.
