I had an idea, inspired by both this thread and a Spiderman novel that I read once:
Alright, so the runners are hired to go and "liberate" a prototype from an Ares research lab; the prototype is a weapon that looks like a bazooka with a glandular problem and is a prototype energy weapon that has several settings next to the battery gauge: Standard, Pencil-cutter, Heavy Blast, Street Sweeper, and the final setting: Leave No Evidence.
The battery has 50 charges, and if the runners decide that they want to fire the weapon:
The Standard setting is an energy blast that acts like a normal shot: it does 8P damage and has a AP of half-Impact armor; it takes one charge from the battery.
The Pencil-cutter is a thin energy beam that, while somewhat difficult to use in combat, can cut through barriers with great ease, doing 30P damage per meter section of the barrier every combat turn to a barrier, which means that a 2-1/2 meter troll could cut himself a doorway in concrete in about half a minute. It takes 1 charge every 2 combat turns.
The Heavy Blast is an overpowered Standard Blast; it takes 2 charges from the battery and does 18P damage and takes two combat turns to charge.
The Streetsweeper is the shotgun mode for the gun, and does 6P damage to any targets within 5 meters of each other at 20 meters. It takes 2 charges and 2 combat turns to charge.
Leave No Evidence combines the power of the pencil-cutter with the blast of the Heavy Blast and the area of the Street Sweeper: it does 40P damage to anything caught within the blast area--a 35 degree cone--and takes 20 charges and 4 combat turns to fully charge. Additionally, the character must roll 1d6: on a roll of 1 or 6, the gun has fried itself and the internal components have fused, rendering the gun useless. Johnson will not be happy.
~*~
Whaddaya think? BTW, the Spidy book in question was the Time's Arrow trilogy from a few years back; supposedly the gun could "shoot through a '57 Chevy lengthwise".