When the time comes to mount your new Trijicon RMRcc Concealed Carry Red Dot Sight you need to have the correct plate to get the job done. Each of these plates is carefully machined to ensure a perfect marriage between your pistol and optic. Don't trust your optic to second rate mounting plates use Trijicon factory mounting plates. The manufacturer recommends professional installation, but a competent individual who is mechanically inclined can perform and complete the installation successfully. Features : RMRcc Mounting Plate Dovetail Base Replaces the Rear Sight