Ammunition, +1, +2, or +3 is a varies ammunition in D&D 5e. Known variants include Ammunition, +1, Ammunition, +2, Ammunition, +3. It does not require attunement.
Weapon (any ammunition), uncommon (+1), rare (+2), or very rare (+3)
You have a bonus to attack and damage rolls made with this piece of magic ammunition. The bonus is determined by the rarity of the ammunition. Once it hits a target, the ammunition is no longer magical.