I have a Mk III with a Tactical Solutions Pac Lite barrel, TK trigger, sear, and something else in the guts of it. I have a Vortex Venom red dot on it and its pretty damn accurate. Its probably my most fun 22 at the moment.
Plan on getting a Mk IV this weekend at the gun show if there is one there for a decent price. I already have all the trick parts for it on hand.
Now if my suppressor would get out of jail, I'd be shitting in high cotton. If the HPA gets passed I am getting 2 more 22 suppressors. They are fun as crap when shooting and all you can here is the 22 slapping steel.