A compensator on your CZ 457 reduces muzzle rise, so you see your hits and get back on target faster. You can choose two original CZ steel compensators, each made for a barrel profile:
Compensator for the American barrel.
Compensator for the Varmint barrel.
Both have a 1/2 x 20 UNF thread. Check that your barrel has this thread before you order. Compensators for other CZ firearms are in Compensators.