I just sent my mk3 22/45 back, I stripped it to clean it, and when I put it back together something happened, it wont fire, the bolt sticks open and I cant take it apart, but I was thinking that I was going to change out the parts, and remove the mag safety by adding either a tandem kross or volquartsen hammer bushing and the email I got from ruger said that they would replace any parts not factory and not return them to me, so that sucks!
Very good gun. The first time you take it down for cleaning you'll wonder why it took all those years for them to design this new system. Disassemble and reassemble literally in seconds. Accurate as can be!
UPDATE......
Since my first post on 04 Dec, 2016 I had a chance to handle 6 different Ruger IV .22 pistols, all were tight as vault . no rattles all very tight.
I bought my first Ruger in the 1950's for less then $40.00 bucks.
JT
Yes, they were made in stainless. They bring a pretty high price now of line. Like 700-750! Maybe they will come down with the Mark IV out? But, If you want a 10" it will have to be the Mark II.