Needs the extra-long-stroke remote trigger actuator for DA firing, though that would require a two-member crew. As with many crew-serviced guns, the need for wheels may be alleviated by the extra back.
When somebody makes a big one, somebody----somebody just has
to make something bigger. Once hefted a 45-70 5 shot revolver!
Was about as ugly as home made snot, and had the balance of a
wheelbarrow.