N-Front Sight Big Dot White Mossberg 500/590

Shotguns with Plain Barrel and Bead Sizes .125Inch/3.18mm to .140Inch/3.6mm Diameter example Remington and/or Winchester comes with extra Bead for Mossberg Model 500 and/or 590, Night Front Sight Green Illuminated Big Dot White Outlined Diameter 0.188Inch/4.78mm, full metal construction, 100% Made in USA Code SG-2005-3 XS Sights. Rework is necessary - Professional installation recommended!-Notice:The front sight Big Dot is placed over the existing bead front sight and glued is helpful - delivery without glue - Fits not barrels with ventilated rib!