Here is my a model 53 dilemma. I have a 4" model 53 barrel. It would look good on a K22 or bored to 32 make a neat 327. except the shank would be to short to work with a 22lr cylinder. I enough for 2 turns (.0555) off the back of shroud and barrel shoulder to take care of that, but then I would need to shorten ejector rod that much too and that wouldn't leave much knurling on it. But a shrouded barrel K22 would be cool.