PTR Industries Firearms(R) magazine is designed for compatible PTR-91 rifles chambered in .308 Winchester and 7.62x51 NATO. The detachable aluminum magazine provides a 20-round capacity and features a black finish. It provides a replacement or additional magazine option for compatible PTR-91 rifle applications.Key Features Designed for compatible PTR-91 rifles Compatible with .308 Winchester and 7.62x51 NATO ammunition 20-round capacity Aluminum magazine construction Detachable magazine design Black finishPTR Industries Firearms(R) manufactures firearms magazines components and accessories for sporting and recreational applications. The company develops products with an emphasis on durable construction functional design and firearm compatibility. PTR Industries Firearms products are manufactured with attention to fit dependable operation and consistent performance.