While the new CZ 457 American shares some components of its predecessor, the 455 American, the upgrades included on the 457 turn it into a new gun entirely. What exactly did CZ-USA tweak on the CZ 457 American to make it the top dog in the company's rimfire rifle lineup? Find out in this exclusive video, hosted by Assistant Editor Connor McKibbin. MSRP: $476-$496; cz-usa.com.