Restoration Ritual is an origin trait in Destiny 2 that can appear on 8 weapons. An enhanced version exists on crafted and some newer weapons.
What Restoration Ritual does
Reviving allies or defeating combatants with finishers reloads this weapon and readies an emergency ammo refill for the next time this weapon runs out of ammo.
Enhanced version
Reviving allies or defeating combatants with finishers reloads this weapon and readies an emergency ammo refill for the next time this weapon runs out of ammo. Handling is improved.