the doog:
I believe there's actually TWO models offered of this same vehicle--one with a different cab or something like that. I believe it's like a "Early/Late" version offering?
Yes they do. One is for the 155mm/8" Guns (Field Artillery) and the other is for the 3"/90mm Guns (Air Defense Artillery). I presume the main difference between the two is in the ammunition stowage arrangements. The 90mm/3" ADA guns used a single piece shell, while the 155mm/8" FA guns used a two piece arrangement of seperate powder charges and projectiles.