Mine Cutter

 is a gun that upon reloading alternates between firing three small, piercing, parallel lasers and single large lasers.

Trivia

 * This gun is a reference to the plasma cutter from Dead Space.
 * The alternating fire mode refers to the plasma cutter's rotator module, which allows the cutter to fire either vertically or horizontally.
 * The synergy is a reference to the game Minecraft.