This is great value, and an exciting replica of a pump shotgun with realistic feel and look! Airsoft guns are perfect for any gun enthusiast, entry-level to advanced. Spring-cocking guns are true to their name in that you cock the spring first, and then fire. These guns are designed to fire 6mm plastic BBs. No gas, batteries, or anything needed for these guns. This system is very cost-effective, and the guns are surprisingly sturdy. Each gun includes a starter pack of 6mm BB Pellets.