Griffin Armament GSMARMRFP: AIS Flat plates are made specifically for Griffin\'s GPM product family of optics mounts. Flat plates allow users to position both secondary, non-magnified optics and other accessories adjacent to their primary day optics for ease of use. The Flat accessory plates can be mounted on all 5 sides of the GPM optic mounts to provide the user with the most flexibility available on the market.