*************
For Ruger MKI, MKII that's not drilled and tapped, remove the rear sight, insert the threaded dovetail filler and install the mount with the screws provided. Accepts all Weaver-style rings and accessories. 5-1/4" long. Weigand p/n = RM2SMB
I used it on my MkIII with an Ultrdot RDS for a few months, stable like a rock! Other than the VERY minor and light mark on the right side from mounting, it is like-new.
List on multiple forums, First "I take it" gets it.
