Recently, I have been OBSESSED with WWI SMGs. They interest me so much. I have been looking for smgs and machine pistols, and these are the ones I’ve found: Beretta M1918, Villar Perossa, Ribeyrolles M1918, Helriegel 1915, Frommer Stop Automatic, Steyr M1912 Doppelpistole, Steyr M1912 Repetierpistole, the Annhilator, MP18, and the Walthers prototype. Are there any more WWI machine pistols or sub machine guns? This includes prototypes, and sub machine guns made before November 11 1918 even if they weren’t used in the war. This also includes submachine gun and machine pistol prototypes/weapons BEFORE WWI.