Its kind of Falloutie? So like not very heavy on it. guns and stuff are going to be pretty few and far between usually only elite soldiers get them or if they're found they get confiscated for the use of the state. 

The furthest I'm willing to go with sci-fi is like... super primitive beam weapons which you would have to use batteries and such. I mean what do you have in mind? I can be pretty flexible if its something reasonable.