PTS EPM mid-cap Magazine - Black (150rds)Constructed from Dupont Zytel Polymer, the PTS Enhanced Polymer Magazine (EPM) is a new take on the mid capacity polymer mags for airsoft AEGs. With a capacity to hold 150 bbs, this very durable magazine can withstand anything you throw at it, or throw it at! The magazine features realistic looking 5. 56 x 45 NATO rounds in the magazine, but also a small window under those to indicate if your magazine is full. On the bottom of the magazine, there is a