[@Prince of Seraphs]
Bullets are in order

Piercing Ammo - Piercing rounds designed for penetrating the hardest of armors that a Aragami might have.
Fire Round - A round that fired releases a steady stream of fire in front simulating a flame thrower. 
Freeze Round - A round that inflicts a bitter cold touch that slows down the enemy
Lightning Round - A round that splits and inflicts a electrical shock in the enemy's system
Divine Round - A homing round that will briefly follow the enemy for a limited amount of time and inflicts divine damage.
Healing round - A medical round that can heal minor damage upon the person.