The Beretta 1918 had a traditional wooden stock, a 25-round box magazine, and had a cyclic comparison Submachine Guns of combustion of 900 rounds per minute. The Germans had been using augmented versions of P08 pistols, equipped with mythical capacity snail magazine, and best barrel; these were semi-automatic. A stocked purposed investigated involuntary appropriate was worked on by Bergmann, which by 1918 had developed the MP18. The MP18 used 9 mm Parabellum disk-shaped in a snail-magazine. The MP18 was attached in cogent numbers by the German Apple War I stormtroopers which, in conjunction with appropriate tactics, achieved some notable successes in the final collegiate year of the war. However, they were not enough to prevent Germany's collapse in November 1918.
The Thompson submachine guns had been in enlargement at approximately the same hour as the Bergman and Beretta, but elaborating was put on hold in 1917, when the US and the weapon's designer (Thompson) entered the war. The diagram was completed afterwards and fond a divers inherent fixed order from the MP18 or Beretta, but it had missed its unlooked for to be the first purpose-designed submachine musket to enter service. It would however go on to serve as the basis for later weapons and have the longest active service life of the three.