The CZ Model 25 (properly, Sa 25 or Sa vz. 48b/ Samopal vz. 48b) utilize a Rate of fire 650 rounds per minute straightforward blowback action, with no locked breech, and fire from the open bolt position. They also use a progressive trigger for selecting between semi-automatic fire and fully automatic fire. Lightly pulling on the trigger will fire a single shot. Pulling the trigger farther to the rear in a continuous motion will fire fully automatically, until the trigger is released or the magazine is empty. After the Sa 25 was declared obsolete in 1968, many of the 9 mm weapons were sold around the world. The surplus weapons were exported to other communist countries including North Vietnam. A somewhat-modified copy of the 9x19 mm model was produced in Rhodesia in the early 1970s and known as “Rhogun”.
