I love it when people trot out all their ignorance at once. The entire point of the Republic was that the people, who are the individual members of the militia and who individually have the RKBA, would personally own the most modern arms available, to reduce the need for a standing army and to prevent a central goverment from considering monopolizing force. Further, the Founders were well-informed of current and proposed tech. DaVinci's notebooks contain plans for all modern arms. They and every other inventor in history by definition were limited only by materials and production methods, not any concepts.

In fact, in 1780, prior to Constitution's ratification, the Austrian Army issued & kept in service for a decade the Girandoni air rifle, 20 shot magazine-fed repeater.

Only people ignorant of history, American and other, American political history and political philosophy, technology in general and firearms tech in particular are impressed by this kind of drivel.