Product Description The ProMag Ruger Mini-14 steel/polymer hybrid magazine is a durable, high-capacity option designed for Ruger Mini-14 rifles chambered in .223 Remington / 5.56x45mm. Built with a steel upper and a proprietary DuPont Zytel-based polymer lower housing, it is engineered for reliable feeding and long service life. ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer&';s defects, with precision-wound magazine springs formed from heat-treated chrome silicon wire. Product Highlights 30-round capacity for Ruger Mini-14 rifles in .223 Remington / 5.56x45mm Steel/polymer hybrid construction: steel upper with black oxide finish and polymer lower housing Proprietary DuPont Zytel-based polymer body components for strength and reduced weight Injection-molded magazine follower for consistent cartridge presentation Heat-treated chrome silicon wire spring for dependable feeding performance Specs Brand Name: ProMag Industries Product Type: Rifle magazine Compatible Firearm: Ruger Mini-14 Caliber Compatibility: .223 Remington / 5.56x45mm Capacity: 30 rounds Construction: Steel upper, polymer lower housing (steel/polymer hybrid) Finish: Black oxide (steel components) Follower: Injection molded Spring: Heat-treated chrome silicon wire Country of Manufacture: USA UPC: 708279016219 Manufacturer Part Number: RUG-A45 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.