make a handgun that doesn't require ammo or reloading.
Could you use any reasonable number of imagination ingots, Psy Orbs, Stars, Grey Matter or anything else that might be necessary to create a Psy beam gun?
And I dunno, maybe whip the Mendeleev scope onto the end to see if it will magnify/concentrate/split the beam.
We would need more than what we have to make a Psy Beam or Energy Gun.
Plastering the scope onto something wouldn't do much without a Lens designed to magnify/concentrate/split a beam
Besides, we can't transmute complicated things in the heat of battle!