I’m certainly no gun nut, but I chanced upon this marvel on YT, admiring what a great leap forward it was for the Allies. The main ideas here are: it’s inconspicuous, breaks down easily, and has the most effective built-in silencer the world had ever seen, at that point. Evidently a fired bullet sounded no louder than a car door shutting from close range, and from distance, in city and crowd environments, it was effectively impossible to hear. Indeed, solving the multi-problem of guns creating noise in three significant ways was the major breakthrough.