CB900F - If/when 452's become unavailable, that's probably the way I'm going to need to go if I want an CZ American, in .22lr. Unless I can find a deal on a 453. Gtscotty - Bore-sighting and zeroing can be such a pain, after each barrel swap. olafhardtB - I had scoped my CZ452 Special .22 with a rimfire scope which fit pretty well. But, when I had taken a good look at it after, I decided that I had enough scoped .22's and removed the scope. CZ's have great iron sights for a reason I guess.