This would be a laser (duhhhh..) that would constantly fire as long as the mouse button is held. It would have a little bit farther range than the napalm launcher and when you use alt fire and fires with 3 times the strength and range, but won't fire rapidly. It would have around 400 ammo and the alt fire would use 3. The alt fire will also blast you back
advantages
alt fire makes a good escape. Fire it at the ground and you'll be launched higher than your normal jump.
disadvantages
the range kinda keeps you from staying far away from a target.
i'd give this 6 credits or so...
EDIT: Oh yea, and if possible the alt fire will go through the target...if it's a player of course.