Heckler & Koch MP5K

The Sa vz. 25 is a variant of the Czechoslovak vz. 23 submachine gun featuring a folding metal stock instead of the fixed wooden stock on the vz. 23. It was designed for use by paratroopers, vehicle crews, and special forces who needed a more compact weapon. The vz. 25 shares the same telescoping bolt action and receiver as the vz. 23. Its folding stock folds to the side, reducing overall length for storage and transport. The weapon is chambered in 9x19mm Parabellum and feeds from a magazine inserted in the pistol grip.

The Beretta M12S is an improved version of the Beretta PM12 submachine gun, a blowback-operated weapon in 9x19mm. It features a telescoping bolt design that allows a compact overall length while maintaining a longer barrel. The M12S relocated the safety from the rear of the receiver to the trigger guard for easier access. It has a 200 mm barrel and a cyclic rate of 550 rounds per minute. The M12S was adopted by Italian military and police forces as well as numerous other countries.

The United Defense M42 is an American submachine gun designed by Carl Swebilius. It was produced for the Office of Strategic Services during World War II. The M42 uses a blowback action chambered in 9x19mm Parabellum and feeds from a 25-round box magazine. It features a wooden stock, a perforated barrel jacket, and a folding magazine well. The weapon was designed to be compact and concealable for clandestine operations. It was one of the first submachine guns designed specifically for intelligence and special operations work.