My Scout squad had to carry one of these pigs often. One man got the receiver, one man got the tripod, one man got 2 barrels and one poor sucker got the ammo. This was on top of our regular issued weapons and ammo, water for 3 days and a radio with extra batteries and 80 lb. rucks. Not always fun sneaking through the mountains with all this to set up an OP/LP.
Still was better than lugging the Mk19.
I guess I was spoiled - I was FA. The only moment of common sense I had regarding the military was, “That howitzer gets pulled by a truck. At least I get to ride.”
When we went mech the hardware got really serious. 14 x .50 and 2 x M60, 14x M203 and 90 individual weapons. A tactically dispersed M109 battery is a big perimeter to defend with few personnel. We made up for it with lots of crew-served weapons. Weight wasn’t a consideration.
Sounds like it might be more effective to haul around a 30 caliber machine gun and a 50 caliber Barret sniper rifle for hard targets.