Product Description The ProMag Industries Ruger Mini-14 magazine is a 20-round steel/polymer hybrid magazine designed to fit Ruger Mini-14 rifles chambered in .223 Remington / 5.56x45mm. Built with a heat-treated steel upper and a polymer lower housing made from proprietary DuPont Zytel-based polymer, it features a black oxide finished steel body section for durability. An injection-molded follower and a heat-treated chrome silicon wire spring help promote reliable feeding. Made in the USA and backed by ProMag&&';;s lifetime guarantee against manufacturer defects. Product Highlights 20-round capacity magazine for Ruger Mini-14 .223 Remington / 5.56x45mm rifles Steel/polymer hybrid construction with heat-treated steel upper and polymer lower housing Black oxide finished steel components for added corrosion resistance Injection-molded follower and heat-treated chrome silicon wire spring for consistent feeding Made in the USA and backed by a lifetime guarantee against manufacturer defects Specs Brand: ProMag Industries Manufacturer Part Number: RUG-A47 UPC: 708279016240 Capacity: 20 rounds Compatibility: Ruger Mini-14 rifles Caliber/Fitment: .223 Remington / 5.56x45mm Body Construction: Proprietary DuPont Zytel-based polymer and heat-treated steel (hybrid) Finish: Black oxide (steel components) Follower: Injection molded Spring: Heat-treated chrome silicon wire 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.