The PTS EPM Enhanced Polymer Magazine AR9 is a premium quality 140 round magazine for AR-9 style builds. This magazine is constructed from a durable polymer which allows for a lightweight but strong construction. The magazine features an enhanced follower, which ensures consistent feeding and reliable performance. The magazine also features a wide variety of features, including a flat base plate, rounded corners, and a flared floor plate, which allows for easy insertion and removal. This magazine is the perfect choice for any AR-9 style build, and is sure to provide reliable performance for years to come.