FAB Defense(R) Ultimag Gen 2 magazine is designed for compatible AR-15-pattern firearms chambered in 5.56 NATO and .223 Remington. The detachable magazine provides a 30-round capacity and features polymer construction with a black finish. This second-generation configuration provides a replacement or additional magazine option for compatible AR-15 applications.Key Features Designed for compatible AR-15-pattern firearms Compatible with 5.56 NATO and .223 Remington ammunition 30-round capacity Second-generation Ultimag configuration Polymer magazine construction Black finishFAB Defense(R) manufactures firearm components and accessories for a variety of handgun and rifle platforms. The company develops purpose-built products with an emphasis on functional design durable materials and firearm compatibility. FAB Defense products are manufactured with attention to fit practical performance and dependable operation.