Trijicon RMRcc Dovetail Mount - Glock All Pistols (Non-MOS) - Designed to be mounted with all full-size Glock pistols such as 17,19 and 45, and for the compact line of Glock pistols like the 42,43 and 43X. Fits all Glock Pistol Models (excluding Glock MOS). Replaces rear sight to allow the mounting of Trijicon RMRcc. Professional Installation Recommended. Fits models 17, 17L, 19, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 34, 35, 37, 38, 39, and 45. Includes 1 Mount Base 2 Mount Screws 1 How To Use Guide