Anyone having trouble with some key bindings? For example, I bind my gadget 2 to back mouse button (RPG for engineer) And he won't equip it in game.

In BF3, I believe you need to bind both the gadget in that slot and "select underslung" to the same key, as it is bound by default, otherwise it will not register. Maybe it's something similar?

Trzeba będzie popróbować. Może to jest rozwiązanie problemu.