main gun wont fire

[woodyskill]

i have made a new tank but i cant figure out how to fire the main gun ammunition is in the tank and i have crew members linked to elevation turret traverse gun loading and aiming i think ive missed a step maybe to link the gun and ammo? any help is appreciated

[Blue]

Click on the ammunition itself and make sure it's the correct caliber. Ran into that issue before myself where the ammo didn't initially correct it's size so the wrong ammunition was loaded. It'll be in a drop down menu near the top right of the ammo customization box when you select them iirc