Is it possible to set it up so that you can ONLY get certain weapons from lockboxes? As in, you cannot build/equip the weapon through any means other than getting it from a lockbox.

I was thinking with something like the ADVENT weapons pack, that it'd be kinda cool if the weapons could only be obtained if you got them out of a lockbox, instead of having them all clutter up your Engineering build menu.

It'd also open up the possibility of having weapons with OP abilities be restricted to lucky, high-tier lockboxes.