The CZ 100 was introduced in 1995 by Česká Zbrojovka (Uherský Brod, Czech Republic), the first of CZs weapons to use synthetic materials. It has a sister model, CZ 101, which has a smaller magazine capacity (7 rounds 9mm or 6 rounds .40).
The "CZ100" was reintroduced in 2000 and called the "CZ100B". It is identical in most ways, except for adjustable sights, trigger and firing mechanism work, and cleaner machining of the main slide and exterior steel.
The CZ 100 has a number of important handgun features. It is hammerless DAO (double action only), meaning that the firing system is under no tension unless the trigger is pulled. There is an automatic firing pin safety device. It is constructed for one-handed cocking, with a protrusion on the slide behind the ejection port intended for pushing against the edge of a fixed surface. The gun uses the usual Browning cam for action. There is a simple compensator on .40 S&W version. The tactical rail allows for the attachment of a laser or flashlight, but only proprietary models.