This AmeriGlo GL-354 Uc Set For Glk Low Grn/blk set was designed for rapid target acquisition, and is composed of a large, highly visible front sight and a black serrated U-notch rear. The simplicity of this combination minimizes distraction and greatly reduces the time between threat identification and threat neutralization, and is the ideal choice for any EDC weapon.Features :"Green tritium" .140" wide with LumiGreen front"Black serrated".165" wide U-notch rear"