don't know if I'm dealing with a bug or something I've done, but I don't believe i havent changed any setting which involves weapons. Just for a test I tried changing the 'weapons control mode' in 'subgame settings' and it had no effect.
I don't receive a message when i try to fire the weapon. it doesnt ask for ammo, however, a firing animation is played on the vehicle model., although not the correct animation in certain models, for example, the OGb model of a cavie with kick animation now squats instead of kicks.