Living history, this official US Army film bulletin outlines the advantages of American automatic weapons compared to Germany's. Side by side live fire comparison of rate of fire vs accuracy and ammunition consumption. https://youtu.be/Oyj-ZHXFKQI Everything in life and war is a trade-off.
Firearms Unknown has done a great job exposing the ridiculous state of federal gun laws. Even though it seems like satire, the definitions are 100% legit. You can google shoe lace machineguns. It is a thing at ATF. https://youtu.be/8nfCyhOX42g Firearms Unknown's YouTube page has