not if i sneak up behind you and cut you in half.. b4 you can even reload
lightsaber is high efficiency, extremely lightweight, don't have to reload ever. for bfg you either need to be The Rock or have at least 2 people to lift that gun, and i'm sure it overheats in a short time. lightsaber has neither of those issues to worry about
as 4 the black hole gun... one answer, death star :I