This new weapon type is introduced in Lost Planet 2, but was present in the first game. However, it was not functional, so it served only as a decorative accessory. It has infinite ammo capacity and is installed on most VS's. To access it, you only need to press the LS and any of the 2 triggers. Unlike other weapons, apart from the turret gun, the auxiliary weapons never run out of ammo and do not need to be reloaded.