The ProMag DRM-A81 drum magazine is engineered for Smith & Wesson CSX 9mm pistols with a 30-round capacity and durable black finish. Built with precision manufacturing and premium materials this magazine is backed by ProMag's lifetime guarantee against manufacturer defects.ProMag DRM-A81 Drum Magazine for S&W CSX 9mm30-round capacity for extended shooting sessionsMagazine body constructed of proprietary DuPont Zytel based polymerBlue steel upper magazine tower for durabilityInjection molded magazine follower for reliable feedingHeat treated stainless steel magazine springMade in USA with lifetime guaranteeIdeal for competitive shooting range training or tactical applications where high capacity and reliable performance are essential. ProMag's precision manufacturing ensures consistent feeding and long-lasting durability.