Trijicon RMRcc, Adapter, Fits S&W M&P Shield OR, Springfield Hellcat OSP, Glock 43X MOS and 48MOS, Black Color AC32092 Each of these plates is carefully machined to ensure a perfect marriage between your pistol and optic. This adapter plate mounts directly to the pistol using the fasteners provided with the mount. The Trijicon RMRcc is then mounted to this adapter using the Trijicon-supplied fasteners.