Zan Projectiles Slugs 4.5mm .177 13gr.These are the new . 177 slugs from ZAN Projectiles, made after many hundreds hours of development to meet high standards in accuracy, expansion and suiting most . 177 barrels on the market! This slug is created for high power air guns and for sub12 rifles. High quality slugs with silky body and deep hollow point for huge expansion with high and even below 700fps velocities. The base shape (shallow hollow base) is made with the design to get the most