USMC?

Army or Marine Corps .

I can't find any reference on this. When was it used?

I built a 105 0n a dukw a few years ago turned good .

Hard to tell from just one photo, but the 105 does not appear to be "mounted" per se, to the LVT. So firing it would be a tricky proposition. Looks like it was just parked there to be hauled to & landed on the beach. How the troops were gonna get it off is another question.

Here are some period pics (Saipan 1944 ?): The howitzer could be loaded inside the cargo bay providing the gun tube was elevated. H.P.

Thanks for posting those. I just read about loading that way. Easier to get out and better freeboard in the LVT than with a DUKW. Is this kit supposed to represent the 105 in firing position? There were vague indications of some improvised mounts on Okinawa to overcome the mud and flooding from the Plum rains.

"Marines improvise and overcome",Clint Eastwood "Heartbreak Ridge".

As per Concord no. 7032 (US Amtracs and Amphibians at War 1941-45) this was an experimental version and not used in combat (Source: Patton Museum).