DropTheHammer
I just put a Weigand Scope Base on my Ruger MKII. Mine was not drilled and tapped, so I had to have that done. I did however borrow a friends Ruger MKII SlabSide that was factory drilled & tapped so as to get the holes in the same location as the factory.
The only other thing I did was to cut off the scope base flush with the front of the receiver so it does not protrude out over the barrel. In doing so we had to cut a new cross slot for the front ring also.
Other modifications I did to this MKII are : Clark Custom Guns Trigger, Clark Custom Guns Grips, Volquartsen Extended Bolt Stop / Release, and a On Target Guns Blast Shield. In addition I also honed the factory Hammer and Sear to obtain a super crisp trigger pull, which breaks at 2 3/4 pounds.
A buddy put the B-Square on his Ruger MKII at the same time we did mine. The B-Square mount sits a little higher and as such makes it harder (although not impossible) to use the open sights with the scope base attached.
SD Handgunner