[3] The Yugoslav People's Army had initially attempted to adopt the TT as its standard service pistol after World War II, and a number were delivered by the Soviet Union.

[3] However, the Tito–Stalin split prompted the Soviet government to cease military aid to Yugoslavia before deliveries of the pistol were fully completed.

[3] However, its factory was already at capacity manufacturing rifles and submachine guns, and it was unable to open a new production line to produce a new handgun.

[4] Zastava engineers added a dovetailed front sight that may be adjusted for windage, and the top of the weapon's slide is serrated to reduce glare.

[4] There were a few minor internal changes as well, including a unique Zastava firing pin and a captive recoil spring to simplify disassembly.