Product Description The ProMag AR-15 Roller Follower magazine is built for dependable feeding and long-term performance in AR-15 5.56mm/.223 rifles. It features a rugged polymer body in Flat Dark Earth (FDE) and a patented anti-tilt roller follower designed to promote smooth, consistent cartridge presentation. A heat-treated chrome silicon spring supports reliable function, and the magazine is made in the USA and backed by ProMag&';s lifetime guarantee against manufacturer&';s defects. Product Highlights 40-round AR-15 5.56mm/.223 capacity for fewer reloads at the range Patented anti-tilt roller follower helps promote smooth feeding and consistent cycling Durable polymer magazine body (DuPont(TM) ZytelA(R)-based polymer) in Flat Dark Earth (FDE) Precision-wound, heat-treated chrome silicon spring for long-term reliability Made in the USA and backed by a ProMag lifetime guarantee against manufacturer defects Specs Brand Name: ProMag Industries Manufacturer Part Number: RM-40-FDE UPC: 708279014093 Platform Compatibility: AR-15A(R) / 5.56mm rifles (also commonly used with .223 Remington) Capacity: 40 rounds Body Material: Polymer (DuPont(TM) ZytelA(R)-based polymer) Follower: Patented anti-tilt roller follower Spring Material: Heat-treated chrome silicon wire Color: Flat Dark Earth (FDE) 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.