Railguns

Railguns use super-powered electromagnets to propel solid tungsten slugs at tremendous velocities. This draws on a lot of power and requires an extremely strong barrel, or opposing pressure of the magnets risks causing the weapon to explode.

Changes from equivalent Firearm:

1.   +2 base damage
2.   Fires rounds of a calibre 5 times smaller, although for every other purpose are treated as firing the original calibre of weapon.
3.   Base cost is equal to the calibre's recoil (as if it were a firearm) times $750 instead of $100.
4.   Always fires Tungsten Flechettes, so always have smoothbore barrels. This results in +50% range and AP 2 rounds.
5.   Power and Ammunition: Rail weapons require both ammunition (in the form of heavy tungsten darts) and power from internal batteries, like a laser. Firing a railgun uses ammunition in the same way that a standard firearm does. The weight of the power cell in addition to the moving parts of a kinetic energy weapon increases the base weight of the weapon by +50%, however.
6.   Barrel Wear: Standard railgun barrels are made of high-quality steel. On an attack roll of 1, roll another d6. On another result of 1, the barrel is damaged to the point of being unusable. Firing the weapon with a damaged barrel destroys the weapon, and the damage -3 to the wielder. Replacing a barrel takes twelve seconds (faster with Rapid Reload and similar abilities). Replacement barrels cost the weapon‚s base (before being increased by turning it into a Railgun) cost divided by 2, and weigh 1/10 th of the weapon‚s base weight.
7.   Special Barrels: Titanium barrels cost ten times as much, but let you reroll barrel damage rolls. Adamantine barrels cost 250 times as much, and never damage themselves.