High quality sight systems offer exceptional brightness in a low profile configuration that won't hang up in your holster or slow you down. CNC machined, steel construction provides superior durability for combat or competition. Dovetailed rear with set screw (except Sure-Sight) and screw-on front sight makes replacement of Glock factory sights fast and simple. All sights, except Sure-Sight, match factory sight height. Fiber optic rods produce a brilliant shine in bright and low light conditions without battery power. Contrasting green rear and orange front ensures fast sight recognition and alignment. Rear sight features two individual fibers for maximum surface area to collect amb Mfg: Truglo SPECS: Steel, matte black. Sight heights same as factory. Front - .720 (18.3mm) long, .142 (3.6mm) wide. Rear - .650 (16.5mm) long, .720 wide. 131G1 - Fits models 17, 17L, 19, 22, 23, 24, 26, 27, 33, 34 and 35. 131G2 - Fits models 20, 21, 29, 30, 31 and 32.