You can get small (1" to 6" long x .5", .75", 1" or 1.5" high) risers that screw on standard Picc rails to lift sights, lights & scopes. I know some people disagree, but common sense tells me that lasers should be centered in the same plane as the barrel in a "fixed" position (not as critical for a light which is fine on a side mount off the top). To mount a laser sight and/or a light on the bottom rail of a KSG (or any rifle that has a rail that moves with every racking motion) is counter to being able to site the weapon quickly in a SHTF situation (when fractions of a second make the difference between life or death) because the back and forth movement of racking the rifle will add such fractions to recapture your focus. You must expect your target is also moving and the iris of your eye will not be working as hard if your laser &/or sight are in a fixed position.