For those who don't like the low capacity standard AEG Magazine, but yet hate winding and the rattling from High Capacity Magazine. 100 BB Rounds Capacity, Plastic magazine for M16 /M4 Series, 5 Magazines Box Set. Compatible with most M4 / M16 Series of Airsoft AEG: Tokyo Marui, JG, CYMA, It may work with other brands AEG but Airsoft Supply Drop cannot guarantee this. Instruction: Due to design of mid-cap magazines, it may require loading / unloading a few time to fully break it in and start feeding perfectly. We only recommend Blaster, Madbull, G&G, Excel, King Arms and Tokyo Marui BBs. If you are unsure if this magazine will fit your Airsoft Gun please don't hesitate to ask.