Precision-machined aluminum scope mount attaches securely to the carry handle of your AR-15/M16/M4 to provide a solid, lightweight platform for tactical optics. MIL-STD 1913 rail cut accepts Picatinny, STANAG, and Weaver-style mounting systems, while hollow, .335'''' diameter sight channel offers unobstructed use of standard-issue iron sights without removing mount. Locks tightly in place with hardened steel stud and knurled nut that also allow fast, easy removal and reattachment of mount and attached optics without loss of zero. Positions scope to provide adequate eye relief when wearing a protective chemical/biological mask. Standard issue for Israeli Defense Forces, and deployed with the U.S Mfg: Smith Enterprise SPECS: Machined 6061 T6 aluminum, hardcoat anodized, black, matte finish. 5-3/8'''' (13.6cm) long. 2.5 oz. (71g) weight. Made in U.S.A.