wrist energy weapon like cowboys and aliens

[skwidkidd]

I am trying to figure out how to make a weapon like the wrist weapon in cowboys and aliens. I know it's an energy weapon but I don't know how to make it for 3.5 d&d.

[Debihuman]

It's a ranged weapon that deals force damage. It needs to charge before it can be used and must be attuned to the wielder. An unattuned weapon gives the wielder a -5 penalty to hit.[It should take 24 hours to attune to a new owner]. Creatures hit by the weapon must save or be knocked back 10 feet. It is noisy and lights up. It takes up a wrist slot.

I have no idea what the cost would be (on par with magical weapons that cause same amount of damage). Alien technology screws up the economy.

Damage 3d6 small, 4d6 medium.
Crit. 19-20/x3.
Range increment 200 feet.

Weight 2 lbs.

Sure it could do more damage but who exactly get to have it? It's guaranteed to be an item the PCs shouldn't have.

Debby