Originally Posted by Daedalus
Speaking in movie terms, coupled with real-life points, the reason it even 'worked' in the movie Resident Evil 2 was because the user had super-human strength.
Well, that solves the whole problem, doesn't it?
Either limit sales to super-humans, or provide a smallish helium balloon to support the weight of the power supply and ammunition. Details are left for the student, as they used to say in my college days.