Antiballistics Field

An invisible 40-foot-radius field of magic extends from you, disrupting bullets and causing firearms to malfunction. Within the sphere, attacks with firearms fail, and firearms used to make an attack immediately jam. A jammed firearm can’t be used to make an attack until a creature uses its action to clear the weapon malfunction.

Firearms outside the sphere which are fired into it have disadvantage on attack rolls, and deal only half damage on a successful hit.