Smith Wesson Revolver WEIG-A-TINNY Mini Mount. scope mount replaces the rear sight on most S&W Revolvers manufactured after 1992. Fits K, L, N, and X frame revolvers that come drilled and tapped from the factory. Top straps on older S&W revolvers can be easily drilled and tapped for this scope mount. Oversize recoil lug prevents the scope mount from shifting even when shooting full-house, magnum loads. Accepts all Weaver-style rings and Picatinny accessories. 2-1/2" long, weighs .9 ounces. Screws are supplied and are 6-48 thread. Mfg: Weigand Combat