Summary

These files are to mount a red dot optic with the RMR footprint on the Ruger Mk3 or Mk 4 pistol. (Mk 3 tested)

Ruger Mk3or4 RMR 1 - mounts the optic forward of the ejection port with part of the mount over the barrel

Ruger Mk3or4 RMR 2 - mounts the optic forward of the ejection port with part of the mount over the ejection port

Ruger Mk3or4 RMR 3 - This is the same as RMR 2 with some support modeled in to make for easier cleanup.

I printed horizontally at 100% infill with tree support. Slight cleanup was necessary for a proper mount to the receiver.

6/32 threads are modeled into the part for mounting the optic. VibraTite is recommended on the on the mount screws and the optic screws.

The Ruger Mk 3 uses 6-48 screws. The factory screws for the dovetail mount should work. If not your local Ace Hardware should have them