Elite Tactical Systems(R) magazine is designed for compatible Sig Sauer P320 pistols chambered in 9mm. The detachable magazine provides a 21-round capacity and features ETS polymer construction with a translucent Carbon Smoke finish. The design allows visual indication of remaining ammunition while providing a lightweight and durable magazine configuration.Key Features Designed for compatible Sig Sauer P320 pistols Designed for 9mm ammunition 21-round capacity Durable polymer construction Translucent body allows visual indication of ammunition Detachable box magazine design Carbon Smoke finishElite Tactical Systems(R) manufactures firearm magazines and accessories for a variety of popular firearm platforms. The company specializes in lightweight polymer magazine designs with an emphasis on durability visibility and dependable function. ETS products are manufactured with attention to compatibility material performance and consistent operation.