"Originally Posted by Shizzlemah
I'd avoid the Mk3 or 22/45
Any specific reason for this comment???"
The Mk3 has a magazine safety. It adds complexity and has a negative impact on trigger pull. They just aren't as clean/crisp as the Mk2.
My Mk2 6+7/8 slabside on the bottom, my dad's Mk2 Bull on the top. We shot them in the NRA gallery league and did pretty darned well.