Copy of Trigger magazine had an article on John Browning. They mentioned one of his designs that's somewhat forgotten these days, his first machine gun the Colt Model 1895 "Potato Digger"

yet again like the prophet he was he figured out that diverting gas to drive a piston or lever would cycle the bolt


I first found out about these when I was 12yrs old and the made for TV movie "Rough Riders" about the Spanish American War premiered. Damn good gun movie if you haven't seen it



interesting article on the Potato Digger