the american didnt sell licens for the 90mm but they allow us to do our best based on they 90mm = you can take a look at the gun with few basic info and made your own version
Yellow helmets, blue helmets, red, red & white helmets, checkered helmets, camo helmets...why so many helmets? Gojira doesn't care what color helmets you guys wear- he still gonna trample Tokyo and burn up all your tanks!