i had an idea for a Railgun laser pistol, but i lack the ability to do what you can do.
it would explode in the radius that spider-trons death explosion does, except without the ring, and takes 2 energy to fire. it goes at about two times the speed arrows go at.
if i knew the software you used for your images i could possibly make a model, but for general design, its similar to the handcannon from destiny.
Edit: it takes a second or two to charge up to fire.