Joe Toys does another round of comparison of alternative magazines to the Marui MWS GBB magazine that can be used for the Tokyo Marui M4 MWS GBB and other compatible GBBRs... "I introduced iron Airsoft and saa / ace1arms the last two times. This time I introduce the ProWin EVO Marui MWS M4 lightweight cartridge. Which one is best for you?"