Ruger(R) AR-556 Magazine is a 10-round magazine designed for compatible AR-15-style rifles chambered in .350 Legend. The magazine features durable steel construction with a black finish and is configured to support reliable feeding of .350 Legend ammunition. It provides a purpose-built magazine option for compatible .350 Legend rifle applications.Key Features 10-round magazine capacity Designed for compatible AR-15-style rifles Compatible with .350 Legend Steel construction Black finishRuger(R) manufactures firearms magazines and firearm accessories for sporting defensive and recreational applications. The company develops products with an emphasis on durable construction dependable function and practical design. Ruger products are manufactured with attention to materials compatibility and consistent performance.