Product Description The ProMag RM30 Rollermag is a 30-round detachable magazine designed to fit AR-15 rifles chambered in 5.56x45mm NATO / .223 Remington. It features a DuPont Zytel-based polymer magazine body and a patented anti-tilt roller follower that promotes smooth, low-friction feeding. A chrome silicone wire spring helps maintain reliable performance, making this magazine a solid choice as a replacement or spare. Made in the USA. Product Highlights 30-round AR-15 magazine for 5.56x45mm NATO / .223 Remington compatibility DuPont Zytel-based polymer body for lightweight, durable construction Anti-tilt roller follower designed to reduce friction and support smooth feeding Chrome silicone wire magazine spring for reliable tension and long service life Made in the USA Specs Brand: ProMag Manufacturer Part Number: RM30 UPC: 708279012204 Firearm Fit: AR-15 Caliber: 5.56x45mm NATO / .223 Remington Capacity: 30 rounds Body Material: DuPont Zytel-based polymer Follower: Anti-tilt roller follower Spring Material: Chrome silicone wire Color/Finish: Black 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.