Forward Controls Design - SIG P320, M17/M18 adapter plate w/ rear sight dovetail for Trijicon RMR

Army issued M17/M18 slide has slightly different plate mounting, the OPF-P320, RMR, RSD is incompatible with Army issued M17/M18.OPF-P320, RMR, RSD is compatible with RMR HD and RCR. If you have an RCR, you must use the capstan screws that came with the RCR.If your RMR HD came with screws, do not use the 6-32 x 1/2 screws that came with RMH HD as they're too long, please use the 6-32x3/8 screws Trijicon provides, or our 6-32x3/8 T15 screws we provide.OPF-P320, RMR, RSD is compatible with P320 X-