Gun Fanatic Achievement

[ursaber]

The primal knife was the only weapon that was missing for me to attain, i hadn't completed the clockwork castellan challenge and used other means to unlock it from the extra content menu.

i've since completed the clockwork castellan challenge but now, when i take out the primal knife from old playthrough where i had unlocked and bought all the guns, i can't get the achievement.

i already have handcannon (unlocked it before the mercenaries update), chicago sweeper, infinite launcher, the primal knife is the only one i didn't have.

is there a way to verify which weapon im missing from collecting (i also have ALL the models in the gallery) or to unglitch the primal knife so i can get the Gun Fanatic achievement?

[BaLuX]

As far as I remember, a weapon counts as obtained only when you put it on your inventory.

Iirc when you unlock a weapon it gets added to your storage, and you need to transfer it to your inventory for it to count.

[Protoman]

Yes, you have to put the weapon in your inventory at least once. If you buy or unlock it and leave it in storage, it doesn't count.