Small arms is a generic term for any weapon that can be correctly operated by one person, so far as I'm aware, as opposed to a squad or crew weapon. Small arms can be taken to include such things as hand grenades, as well as rifles, assault rifles, sub-machine guns, machine pistols and pistols.
My question is, what sort of weaponry are we having?
Personally I find the idea of hand held energy weapons to be laughable. That image of a plasma cannon I posted? That pack on his back would, in reality, contain enough energy for a single shot! Carrying something that big around just to fire it once? Um, no!
HOWEVER, I'm willing to bow to the wishes of the GM on this one.
Eve, if you want laser guns, then go ahead, it won't spoil my enjoyment (although I might be forced to demonstrate the inherent disadvantage of attempting to do damage with something that can be shot right back at you with something I keep in my purse... lol)