This pistol style magazine holds 30 BBs at a time and the CO2 cartridge. Just preload your extra magazine and double your bb output! The Drozd / Bumble Bee Magazine is shown with CO2 Cartridge inserted. In-stock dates are unpredictable and may change without notice due to supply, logistical or U.S. Customs issues. We apologize for any inconvenience and appreciate your understanding.