Coilgun

Coilguns were a weapon primarily used by individuals on small scale.

Typically they consisted of multiple coils arranged along and around a barrel. The coils were switched on and off in a precise sequence causing the projectile to be accelerated quickly along the barrel by magnetic forces.

Coilguns were easy to find and cheap to buy during most eras, this caused them to be used frequently as personal defence weapons.

Coilguns obviously require electricity to function, and as such each magazine of ammunition also incorporates a battery, allowing the weapon to function, and saving the operator having to change both an ammunition magazine and a battery.