The Vzor 45, commonly known as CZ 45 is a compact blowback operated semi-automatic pistol chambered in .25 ACP.

Derived from the CZ-36 following World War II, the CZ-45 is currently manufactured by Česká zbrojovka Uherský Brod as the CZ-92.

[1] In 1945 the CZ-36 was redesigned by Jan Kratochvil to make it easier (hence cheaper) to manufacture and became the Vzor 45 (model 1945) but is generally known as CZ-45.

As a result, American manufacturer Intratec started producing a near-exact clone called the Protec.

When the hammer reaches full cock, it is freed to fall and strike the firing pin, which ignites the cartridge.