I have a cz 455. Mine was a trainer but it ended up with an varminter stock and no iron sights. Its definitely full size, full weight rifle. Cz has a fan club among rimfire shooters, most I have seen are pretty accurate but I know every once in a while they kick one out that is pretty average at best. It helps to make sure everything is torqued correctly on them. Scope, just make sure to get an adjustable objective that will focus down to 25yds or less. My gun will hold about 1moa about half of the time at 50 yds with cci or federal target, but if you feed it sk+ or rws comp rifle, it really tightens up and is a lot more consistent. A lot of folks swear by the cci standard velocity as best accuracy/$, but I noticed a very significant improvement in accuracy out past 50yds when I went to match grade ammmo. There are a lot of aftermarket parts and assessories available for CZ, but if you put too much into it after market you might as well get an anschutz.