Product Description The ProMag Industries RM-10 Rollermag is a compact 10-round magazine designed for AR-15 pattern rifles chambered in .223 Remington / 5.56 NATO. Built with a proprietary DuPont Zytel-based polymer body and a patented anti-tilt roller follower, it&&';;s engineered to reduce friction for smooth, consistent feeding. A precision-wound, heat-treated chrome silicon spring helps deliver reliable performance, and the magazine is made in the USA and backed by ProMag&&';;s lifetime guarantee against manufacturer defects. Product Highlights 10-round capacity magazine for AR-15 rifles in .223 Remington / 5.56 NATO Patented anti-tilt roller follower helps reduce friction for smoother feeding Proprietary DuPont Zytel-based polymer body for lightweight durability Heat-treated chrome silicon spring for consistent tension and long service life Made in the USA and backed by a lifetime guarantee against manufacturer defects Specs Brand: ProMag Industries Manufacturer Part Number: RM-10 UPC: 708279013621 Platform/Fit: AR-15 Caliber Compatibility: .223 Remington / 5.56 NATO Capacity: 10 rounds Body Material: Proprietary DuPont Zytel-based polymer Follower: Patented anti-tilt roller follower Spring Material: Heat-treated chrome silicon wire Color: Black Country of Manufacture: USA Warranty: Lifetime guarantee against manufacturer defects 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.