You happen to run into beer addled Stripe Blaze at a book store. You tell him about your weapon. He signs up on the spot without even seeing it. Turns out he has been waiting for a chance to fight an armed rebellion against the man for a long time now. And his car is on its last legs. So it might as well be converted into a Mega-Weapon. You work for several hours in his air conditioned shop. when you are done two powerful Mega weapons stand side by side. Stripe is full of ideas about who to use them against as well.