In any airsoft game, you will want extra airsoft magazines or mags. Spare magazines or replacement magazines will allow you to quickly reload on the field oppose to loading BB's into the magazine, then needing to be load that filled magazine back into the gun. Different types of airsoft guns require specific types of magazines. A variety of options are available for magazines including high-capacity magazines (or hi-cap) that carry 200+ rounds, middle-capacity magazines (mid-caps) that typically carry 100 rounds, and low-capacity magazines (low/real caps)that carry 30 rounds. Be sure the magazine is compatible with your make, model, and manufacturer of your gun as each magazine will be specific to certain guns.