I have a CZ 452 American, and a CZ 452 Special. While I have not yet free floated the barrel and installed a lighter trigger spring on the American, I have installed a lighter trigger spring on the Special. At this point the Special, which is much less expensive than the American,
is the more accurate of the two. The Special, at $233
suggested retail, and often available at $190-$200, is a great buy.