whats a RAIL DRIVER Red Faction Armageddon

Answer 1

eh its a weapon

here is what armory says about it:

Type of Item:  Firearm
Origin:  EDF
Uses:  Anti Personnel
Using a portable linear accelerator, the Rail driver super accelerates a depleted uranium slug to incredible velocities, making it not only amazingly accurate but also capable of penetrating almost any material to hit the being behind it. Also comes equipped with an x-ray zoom scope.