My R9s 132 came with Torx No. 7 grip screws. I assume that all of the current R9 series use the same screws. Be careful when removing them. Torx No. 7 is a small screw head and can be easily stripped. Also, the male grip studs are fitted tightly into the female receptacles of the frame. A fine blade carefully applied to one of the bottom corners of the grips may be required to pop the panel free of the frame. When removing the right grip panel, take care not to disturb the trigger mechanism -- unless you want to reassemble the parts. If such is needed, just study the various parts -- trigger, bar, spring . . . . Two coils of the spring fit over two posts in the frame, the large coil rests in a groove in the grip, and the bitter end of the spring fits into a small hole in the bar. Interesting, simple, . . . an inspired design -- but be aware that it is a design which requires good light and a stable platform to field-strip and clean the weapon, especially when taking it down to the level of inspecting the trigger mechanism.
The more I learn about the Rohrbaughs, the more I like them. (This certainly ain't my old 1911!")
RS