This weapon gains energy when you pick up Vestiges and allows you to create ammo at the projectile impact point for you and your allies. Special ammo mode unlocks at 50% energy, while Heavy ammo mode unlocks at 100% energy.
To transform Vestiges into Special ammo, [Alternate Weapon Action] and cycle through all available firing modes.
To transform Vestiges into Heavy ammo, [Alternate Weapon Action] and cycle firing modes a second time.
To transform Vestiges into Special ammo, [Alternate Weapon Action] to activate Special ammo mode. [Alternate Weapon Action] a second time to activate Heavy ammo mode.