ProMag Industries Ruger-57 20-Round 5.7x28mm Steel Pistol Magazine, Blued Finish RUG-A42

Product Description The ProMag Ruger-57 magazine (RUG-A42) is a 20-round aftermarket pistol magazine chambered for 5.7x28mm and designed to fit the Ruger-57. Built with a heat-treated steel magazine body and a durable blued/black-oxide style finish, it pairs modern injection-molded polymer components with proven spring steel performance for consistent feeding and long service life. Manufactured in the USA, it is backed by ProMags lifetime guarantee against manufacturers defects. Product Highlights 20-round 5.7x28mm pistol magazine designed to fit Ruger-57 handguns Heat-treated high-carbon steel magazine body for strength and durability Injection-molded polymer follower engineered for smooth, consistent feeding Heat-treated chrome silicon wire spring helps maintain reliable tension over time Made in the USA and backed by ProMags lifetime guarantee against manufacturer defects Specs Brand: ProMag Industries Manufacturer Part Number: RUG-A42 UPC: 708279015335 Compatibility: Ruger-57 Caliber: 5.7x28mm Capacity: 20 rounds Body Material: Heat-treated steel Follower Material: Polymer (injection molded) Spring Material: Heat-treated chrome silicon wire Finish: Blued / black oxide (see notes) 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 products manufacturer.