The Weapons Armament Research Glock MOS RMR-G (guard) was specifically designed for Glock pistols with factory MOS optic mounting system. The RMR-G is made to fit a Trijicon RMR optic sight only.
The RMR-G was developed to help mitigate damage the optic might take during hard use. Instead of scratching your expensive optic it is guarded by a steel bumper guard. The guard serves multi purposes, you can do one hand manipulations to chamber a round off the side of any object like a table or ledge. It also has micro serrations to help it grip from slippery surfaces. The guard also prevents smudging the glass from racking the slide with your palm. Aside from that the guard has built in ears that keep the RMR from touching the surface when the pistol is laid down.
RMR guards sit the the optic at the same height as factory.
RMR-G's are black salt bath nitride for maximum effort!
Screws are provided to mount the RMR to the RMR-G
OEM supplied MOS screws are needed to mount the RMR-G to the slide. These come with your MOS pistol.