| CZ Model 25 | |
|---|---|
| Type | Submachine gun |
| Place of origin | Czechoslovakia |
| Production history | |
| Produced | 1948–1968 |
| Specifications | |
| Weight | 3.27 kg empty (folding stock models Sa.25, Sa.26); 3.5 kg empty (fixed wood stock models Sa.23, Sa.24) |
| Length | 445 mm folding stock model folded (Sa.25, Sa.26); 686 mm fixed stock and unfolded folding stock |
| Barrel length | 284 mm |
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| Cartridge | 7.62x25mm Tokarev 9x19mm Parabellum |
| Action | Blowback |
| Rate of fire | 650 rpm |
| Feed system | 24 or 40 round (9 mm Sa.23, Sa.25); 32 round (7.62 mm Sa.24, Sa.26) |
| Sights | Iron |
The CZ Model 25 (properly, Sa 25 or Sa vz. 48b/samopal vz. 48b – samopal vzor 48 výsadkový, "submachine gun model year 1948 para") was perhaps the best known of a series of Czechoslovak designed submachine guns introduced in 1948. There were four generally very similar submachine guns in this series: the Sa 23, Sa 24, Sa 25, and Sa 26. The primary designer was Jaroslav Holeček (1923–1927), chief engineer of the Česká zbrojovka Strakonice arms factory.
The Sa 23 series utilize a 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.
The Sa 23 series were the first production-model submachine guns with a telescoping bolt, in which the forwards part of the moving bolt extends forwards past the back end of the barrel, wrapping around that barrel. This feature reduces the required length of the submachine gun significantly and allows for better balance and handling. Handling was further improved by using a single vertical handgrip housing the ammunition magazine and trigger mechanism, roughly centered along the gun's length. The gun's receiver was machined from a single circular steel tube.
The design of the Sa 23 series submachine guns is most notable in the West for having heavily inspired the slightly later Uzi submachine gun (Hogg 1979:157).
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The Sa 24 and Sa 26 were introduced after Czechoslovakia joined the Warsaw Pact, and were redesigned to fire 7.62x25 mm standard Soviet type pistol ammunition.
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 model was produced in Rhodesia in the early 1970s as the LDP. Manufacture was later transferred to South Africa where it was briefly marketed as the Sanna 77 in semi-automatic fire only.
Many parts kits were imported into the U.S. in the early 2000's with the receivers demilled incorrectly (they had been saw cut instead of torch cut). This prompted ATF to send a letter in 2007 to distributors asking for the receiver pieces back which was then forwarded to many of the final purchasers. The letter only asked for the receiver pieces back, but as these had key parts welded onto them (such as the magazine well) it is likely some receiver pieces were returned with vital portions of the firearm still attached. Parts kits available on the secondary market have since risen in value and many of the ones that are available are incomplete.
Hogg, Ian V. (1979). Guns and How They Work. New York: Everest House. p. 157. ISBN 0-89696-023-4.
Jones, Richard (2009). Jane's Infantry Weapons 2009-2010. Jane's Information Group. p. 894. ISBN 0710628692.