Conjure Magical Munitions

You hold a piece of ammunition for which you are proficient in the weapon that utilizes it and dissolve it into the immaterial. Six floating orbs of elemental energy of your choosing come into being, floating around your forearm, and last for this spell's duration. As a free action when attacking with a weapon that uses the selected type of ammunition, you may remove one of these six orbs, imbuing the attack with the chosen type of elemental damage (acid, cold, fire, lightning, or thunder), granting it +1d4 damage of the chosen type.

At Higher Levels. For each spell slot level above 2nd this spell is cast at, increase its duration by 1 minute, and add 6 additional charges that may be used for ranged attacks.