The CZ 457 was designed to improve on the popular
CZ 455 rifle family, notably the inclusion of a
push-to-fire safety in line with the barrel, and replacement of the 455 stamped steel unitary bottom. Bolt rotation was also reduced to 60° from 90° in the 455. Trigger adjustment is also claimed to be improved. The rifle (with its respective barrel) can be chambered for
.22 LR,
.22 WMR &
.17 HMR. ==Developments==