The Forward Controls OPF-G43x/48, RMRcc (Optics Platform, Forward Controls, G43x/48, RMRcc) is the latest member of the OPF line. Since the RMRcc is longer than the G43X/48 MOS cut, the sight overhangs on the slide. When installed, the bottom of the RMRcc (with Trijicon provided sealing plate installed) is almost flush with the top of the slide so the sight is as low as possible.

They positioned the RMRcc towards the center of the plate as much as feasible. This reduces the amount of unsupported overhang on the RMRcc’s sealing plate in front.  The RMRcc has a rubber gasket around its battery compartment to keep water and moisture at bay, which pushes the sealing plate downward.  This isn’t an issue if the plate is of the same length as the RMRcc, but with an overhang, it creates a slight gap between the gasket and the sealing plate.

The OPF-G43x/48, RMRcc’s design eliminates the gap/opening between the sight and sealer plate, to the point of emulating a plate that’s as long as the sight itself.  Forward Controls did not want the sealer plate and the sight to make contact with the top of the slide; the sealing plate to top of the slide gap is around 0.005.  There isn’t any gap between the RMRcc and the sealer plate, thus maintaining the seal.

For standard frame Glocks using an RMR, look to the OPF-G, RMR plate.