"Hey Summer; so we've opted to put in a lot of really powerful guns this shipment. You've already been told about the Inferno Pistol, but there's a few others going in. My contribution is a weapon resembling a rocket launcher called the Total Conversion Bazooka. It actually doesn't shoot rockets though, being more like a laser.
When fired with its optimal ammunition, this weapon can deliver an amount of energy equivalent to a ball of TNT three and a half miles across to a single target; I'm not quite sure how it works, but the device prevents any of the energy from leaking out of the target and devastating the landscape. Basically, anything you fire that weapon at dies instantly.
Anyway, since it's powered by directly converting mass into energy, you should theoretically be able to reload it with anything you can shove in the ammunition chamber, the denser the better."