Zap rounds are rubber or gel bullets that create an electric charge upon firing in a piezoelectric like manner to stun the target effectively with both the bullet and the electric shock. Similar Gear Accushot Ammo Armor-Piercing Ammo Biter Ammo Bug Ammo Capsule Ammo Flayer Ammo Flux Ammo Hollow-Point Ammo Homing Ammo Jammer Ammo Laser-Guided Ammo Plastic Ammo Proximity Ammo Reactive Ammo Reactive Armor-Piercing Ammo Regular Ammo Splash Ammo Zero Ammo