The AAP-01 Drum Magazine from Action Army gives you nearly bottomless fun on the airsoft field. This gas drum magazine holds 350 BBs, and is filled using the extra-large easy-fill cover. Instead of a winding wheel, this magazine uses a flash mag pull-string for ease of loading. A QD sling socket on the back allows you to attach a sling to protect your magazine from being accidentally dropped. The AAP-01 Drum Magazine is compatible with all TM-spec airsoft pistols that use G-series magazines.