The PTS EPM1 AEG magazine M4 magazine holds an incredible 250-round BBs capacity and offers the same reliability that all PTS magazines have long been famous for. It is compatible with most Airsoft AR-15 M4 AEGs including Tokyo Marui, KWA, G&P, VFC, including the HK416, PTS PDR-C, PTS ERG series, PTS Masada AEG, the AMOEBA AM Variants, and many more. The magazine is available in Black and Dark Earth.