The Evike BAMF m.agazine features a robust construction, performance, light weight, a slick and simple overall appearance, and ninja quiet s.tealth operation. Mid-Cap version: The 190rd BAMF m.agazine is among the highest c.apacity mid-cap m.agazine on the market boasting easy maintenance, dummy r.ound window, textured surface all around, and is made to outperform. MilSim version: The 30 round "realistic c.apacity" m.agazines are made available for the tra.ining and Milsim type gaming looking for true realism. Compatibility: For Tokyo Marui, Matrix, G&G, G&P, ICS, JG, Elite Force, VFC, Classic Army and other compatible M.4 / M.16 Airsoft AEG R.ifles Note: Not compatible with Seekins Precision SP.223 Airsoft R.ifles. Attention: Fit varies widely between different manufacturers for your Airsoft product. Some custom or modified r.ecievers or m.agwells can cause issues with these m.agazines. If the fit doesn't work or isn't compatible with your brand/manufacturer product, then please request for a return.