Make sure you always have a spare magazine on deck and pick up this 5-pack of 300 round high capacity magazines. Compatible with most M4 and M16 style AEG airsoft rifles, these magazines feature ergonomic finger rivets to provide players with optimal grip when hastily changing magazines. A high tension internal spring ensures smooth BB feeding from the magazine into the firing chamber. The full metal frame is extremely durable against the hardships of airsoft warfare. Lancer Tactical provides everything you need to stay in the fight all day and secure the win by providing convenient packages such as this bundle of high capacity magazines.