Keep a spare 45 round magazine on hand for when things get tough with this high quality magazine option from WellFire. Constructed from a polymer frame and full metal internal parts, this magazine is realistically weighted and can withstand the hardships of airsoft warfare. Green Gas or propane powers this magazine, and is filled through the bottom. WellFire went ahead and added automatic cut-off in this magazine to prevent further shots once the magazine is empty. Stock up on everything you need for those extended skirmishes and pick yourself up a spare 45 round magazine for your AK74U airsoft rifle.