"I modified it from a machine gun." Dominic handed Shire a document and explained, "A new piece of equipment appeared in Italy, the Perosa machine gun. I found it very suitable for use as a submachine gun, so I took it apart and made some slight modifications."
(The picture above shows a double-barreled Perosa light machine gun, produced in 1915. The OVP1918 submachine gun was almost made by taking it apart into a single barrel and adding a stock. Many consider it to be the world's first submachine gun because it uses pistol ammunition. However, from its design, it was intended for use as a light machine gun, not having the portability and on-the-move firing capabilities of a submachine gun.)
Looking at the document, Shire finally understood why Dominic's submachine gun came out so quickly. It was indeed modified from a machine gun, and it was a machine gun that fired pistol ammunition. It hardly needed any changes and could be directly copied.
