Product DescriptionThe ProMag DRM-A102 drum magazine is designed to fit the Smith & Wesson SD40 pistol in .40 S&W and provides an extended 50-round capacity for longer range sessions with fewer reloads. Built with a proprietary DuPont Zytel-based polymer magazine body and a hybrid steel upper magazine tower, it balances durability and reliable feeding. ProMag magazines are made in the USA and are backed by a lifetime guarantee against manufacturer defects, with careful quality checks throughout the assembly process.Product Highlights High-capacity 50-round drum magazine for Smith & Wesson SD40 .40 S&W pistols Proprietary DuPont Zytel-based polymer body for strength and reduced weight Hybrid steel upper magazine tower designed for dependable fit and feeding Injection-molded follower for consistent cartridge presentation Heat-treated stainless steel spring engineered for reliable cycling Specs Brand: ProMag Industries Manufacturer Part Number: DRM-A102 UPC: 708279016264 Firearm Compatibility: Smith & Wesson SD40 Caliber: .40 S&W Capacity: 50 rounds Magazine Type: Drum magazine Color/Finish: Black Body Material: Proprietary DuPont Zytel-based polymer Upper Magazine Tower: Hybrid steel Follower: Injection molded Spring: Heat-treated stainless steel Country of Manufacture: USA Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.