Air Venturi Dust Devil BB's .177 / 4.5mm Lead Free BB Ammo Balls 4.35gr
Muzzle Energy: 1.5ftlbs. Dust Devil BBs are the world's first frangible BBs in. 177 / 4.5 mm BB. They shatter on hard surfaces on impact, minimizing the risk of ricochets for which steel BBs are known.