Kriss(R) magazine is designed for compatible KRISS Vector firearms using Glock-pattern 9mm magazines. The detachable magazine provides a 40-round capacity and features a black finish. It provides an extended-capacity magazine option for compatible KRISS Vector and Glock-pattern applications.Key Features Designed for compatible KRISS Vector firearms Glock-pattern magazine compatibility Designed for 9mm ammunition 40-round capacity Extended detachable magazine configuration Black finishKriss(R) manufactures firearms magazines components and accessories for sporting recreational and professional applications. The company develops products with an emphasis on functional design durable construction and firearm compatibility. Kriss products are manufactured with attention to fit dependable operation and consistent performance.