This light leather bag is attached to an inverted wooden funnel with a cork stopper where its drawstring would be. The bag can hold 20 sling bullets which just barely fit through the funnel’s opening.
As an action you can uncork the bag and focus on it, choosing a target you can see that is within 120 feet of you. On your next turn if your target is still visible and in range as an action you can guide a sling bullet out of the funnel, sending it darting around cover to its target and dealing 1d4+1 magical bludgeoning damage.
When you spend an action in this way you can also choose a new target. You can reload the pouch, either placing 1 sling bullet through the funnel as an action or bonus action, or by spending 1 minute to reload all expended bullets.