Bullet Buckler

Armor (shield), very rare

This small shield provides a +3 bonus to AC. This bonus is in addition to the shield’s normal bonus to AC. It has a rounded boss of adamantine alloy, often showing scorch marks and powder burns upon its surface. A bullet buckler imposes disadvantage on all non-magical range attacks against you including those from gunpowder-based weapons (including siege class weapons) and grenade-based attacks. In addition, it grants advantage on any Dexterity saving throw against gunpowder-based attacks that allow a saving throw.