HIVIZ Glock Front/Rear Combo Sight for 9mm, 40SW Calibers Includes front and rear sight Front sight is interchangeable red and green LitePipes Rear sight contains green LitePipes Front and rear Glock sight set fits all Glock pistols in 9mm, 40 S&W and 357 Sig calibers except ported models HiViz recommends gunsmith installation for all dovetail sights. Due to manufacturing tolerances, some firearms may require additional fitting.