The ČZ 2000 is a prototype 5.56 mm caliber Czech weapon system, consisting of a standard rifle, carbine and light machine gun. The system was developed in 1991 after adapting the LADA firearm prototype (chambered for the 5.45×39mm M74 cartridge to the standard NATO 5.56×45mm round with the SS109 bullet.) J. Denel from the Brno-based Prototypa-ZM company is the chief designer for both systems. The ČZ 2000 (short for Česká zbrojovka, and the number 2000 signifies that this is a weapon system of the year 2000) was to be produced by Česká zbrojovka of Uherský Brod. It was planned to be the new service weapon of the Czech Army, replacing: the 7.62 mm vz. 58 assault rifle, 7.65 mm vz. 61 Škorpion submachine gun and 7.62 mm vz. 59 machine gun. As of 2007, the project has been discontinued.