The German MP38 was revolutionary in that it marked the birth of mass production in sub-machine guns. In stark distinction on the Berettas, plastic replaced wood and simple die-Solid and sheet-stamping output was accompanied by primary finishing. As opposed to previously guns, which had to be manually loaded and fired, https://machguns.com/product/heckler-koch-g3sg1-7-62x51mm-machine-gun-pre86-dealer-sample/