I’d have LOVED to get up that seat of a quad 50 AA set. Bert Gummer in one of the “Tremors” movies. I think it was the one against the Ass-Blasters.......cool..
I have 3 empty of powder 50 BMG bullets in a brass chain belt that dad had in his gun cabinet. He never owned a 50 BMG, but that is not unusual. I never knew anyone who owned a 50 cal. when I was growing up. Now, quite a few people do.
But quite a few people actually own a cannon.
I had a friend when I lived in NM (1972-1986) who was the local coroner who owned one. It was a coastal naval cannon. He would fire it with no projectile on the 4th of July. It set on his front lawn. He had to move it by truck, the weight in relationship to the carriage caused damage to asphalt.