PTS EPM AR9 Magazine120 rd Mid Cap Magazine for ARP 9 Style AEGs! It is important to have high quality magazines to keep up with feeding at high rates of fire, especially if your AEG is upgraded ! These magazines have a fully loaded magazine indicator! My personal recommendation for any mid cap magazine is to fully load, then unload 1 2 bbs for improved lifespan of any Airsoft madcap magazine. "The PTS EPM AR9 Magazine is a midcap magazine with a 120 round capacity and