I have a gun (pistol) called "Rapid Infinity" It comes with infinite bullets. It does not reload. Used unlimited ammo and no reload with it and now it has 0 bullets and cannot be reloaded.
Transferred gun between different toons and it works fine with them. Just not with one toon.
Is there any way to set the number of bullets in the clip to 1?
That is not a problem with the trainer, it is a known glitch with your mechromancer: You chose conflicting perks in the skill tree when you leveled up.
The only fix is to use the skins-booth to pay for the "re-spec" option, read the discriptions of the skills you are picking so you can avoid the conflict. The most easy way is to just NOT pick any perk that affects her ammo count.