4.5MM

Airgun 4.5mm BBs are small, typically steel or alloy projectiles used in airguns such as BB pistols and rifles, rather than airsoft guns. Measuring approximately 0.177 inches in diameter, these BBs are designed for use in high-velocity airguns for target shooting, plinking, and sometimes pest control. Unlike plastic airsoft BBs, 4.5mm airgun BBs are much heavier and capable of causing more damage, so they require appropriate safety gear and responsible handling. Their metallic composition and small size make them ideal for accuracy and penetration in compatible airgun models.