SDM Fabricating Green Fiber Optic Front sight for Smith and Wesson Revolvers. It is a pinned front sight .125W .250H 

Fits all KLN Frame Smith and Wesson Revolver pinned front sights.

The U.S. Arms Export Control Act (22 U.S.C. Section 2778), the International Traffic in Arms Regulations (22 C.F.R. Chapter I, Subchapter M, Parts 120-130), the U.S. Export Administration Act of 1979 (50 U.S.C. App. 2401-2420) and the Export Administration Regulations (15 C.F.R. Sections 730-774) prohibit the shipping of this item outside of the United States.