Product Description The ProMag Industries FN 509 9mm 50-round drum magazine is built to deliver extended capacity and reliable feeding for your FN 509 9mm pistol. Manufactured in the USA, this drum magazine features a durable magazine body with a black finish, an injection-molded follower for consistent round presentation, and a precision-wound spring made from heat-treated chrome silicon wire. ProMag magazines are backed by a lifetime guarantee against manufacturer&';s defects, with assembly and quality checks performed throughout the manufacturing process. Product Highlights High-capacity 50-round drum magazine designed to fit FN 509 9mm pistols Durable magazine body with black oxide finish for wear and corrosion resistance Injection-molded magazine follower helps promote smooth, consistent feeding Precision-wound spring formed from heat-treated chrome silicon wire Made in the USA and backed by ProMag&';s lifetime guarantee against manufacturer defects Specs Brand: ProMag Industries Type: Drum magazine Capacity: 50 rounds Caliber: 9mm Compatibility: FN 509 9mm pistol Color: Black Construction (body): Heat-treated steel with black oxide finish Follower: Injection molded Spring: Heat-treated chrome silicon wire Country of manufacture: USA UPC: 708279015649 Manufacturer Part Number: DRM-A84 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.