Designed by Tullio Marengoni, Beretta's chief gun designer, the 1918/1930 is derived from the World War I era Villar-Perosa sub-machine gun. In addition to abandoning the dual-receiver 'cigarette tray' mounting in favor of a more conventional carbine stock, the feed system was reworked to load from the bottom instead of the top. Blade front and tangent rear sights, with the receiver marked "PIETRO BERETTA - GARDONE VALLE TROMPIA - ITALIA - CAL. 9" and "MADE IN ITALY/BREVETTO 1918-1930/175" at the rear. The left side of the receiver is marked "POLICIA DE LA PROVINCIA DE BUENOS AIRES" (Police of Buenos Aires Province). A mounting lug for a folding bayonet (not included) is present on the barrel, with a sliding dust cover for the magazine port and a smooth hardwood stock with a two-piece cleaning rod in the butt cavity and a steel buttplate. Per ATF guidelines, the Beretta 1918/30 is considered a Curio and Relic, and does not qualify as a "Short Barreled Rifle".