Williams Gun Sight Co. Rifle WGOS Base .660-.730" Barrel Diameter Black

The Williams Guide Open Sight Base requires the use of a Williams Rear Sight Blade (sold separately). These bases are milled from high tensile strength aluminum alloy and include two 6x48 mounting screws. Also feature dovetailed elevation and windage adjustments. Designed to be adaptable to a variety of firearms and may require drilling and tapping rifle. Black. Notes: Heights with blade (except octagon) 3/16" blade, .320 to .420 1/4" blade, .382 to .482 5/16" blade, .445 to .545 3/8" blade, .507 to .607 Heights with blade (TC and CVA octagon) 3/16" blade, .350 to .450 1/4" blade, .412 to .512 5/16" blade, .475 to .575 3/8" blade, .537 to .637 Use 1/4" blade with above sight to match factory front sight on most TC and CVA rifles.