Glock Fiber Optic Tall Profile Small Frame ( ABA131 )Fits all standard size small frame Glocks. (9mm, 357 SIG, 40 S&W)* Does not fit Glock MOS, G42, or G43 *Kit includes: 1 Height Fiber Optic Serrated Front Sight .305" Tall 1 Blank Serrated Rear Sight .310" Tall with .125" wide notch featuring shortened front ledge that will fit slides cut for an optic Fiber Optic Rod 2" 1.5 mm Red 2" 1.5 mm Green Screws Front sight screw Rear sight set screwGlock Fiber Optic Tall Profile Large Frame ( ABA132 )* Does not fit Glock MOS, G42, or G43 *Kit includes: 1 Height Fiber Optic Serrated Front Sight .285" Tall 1 Blank Serrated Rear Sight .310" Tall with .125" wide notch featuring shortened front ledge that will fit slides cut for an optic Fiber Optic Rod 2" 1.5 mm Red 2" 1.5 mm Green Screws Front sight screw Rear sight set screwDISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.