Conjure Ammunition

Touch your quiver or another ammuniton container and as a bonus action, you can conjure 20 nonmagical pieces of ammunition. They remain for 1 minute or until you use this feature again, after which they then vanish.

At Higher Levels. At the 5th level spell slot and over, these arrows are considered magical for the purposes of overcoming resistance and immunity to nonmagical attacks and damage.

this was taken from the Arcane Archer subclass