The Trijicon RMR is the perfect reflex sight for your ACOG. With its easy to install adaptor plate, you can quickly and easily add a hardpoint to mount your RMR. The RM35 is compatible with 3.5x, 4x, and 5x ACOGs with mounting bosses. Each RM35 mount includes mount screws and screws to install the RMR. With its clean and simple design, the Trijicon RMR is sure to give you the edge you need on the battlefield.