Product Description The ProMag COL19 is a compact 5-round detachable magazine designed for AR-15 pattern rifles chambered in .223 Remington / 5.56x45mm. Built for dependable feeding and easy loading, it features a rugged steel body, a precision-wound heat-treated chrome silicon spring, and a polymer follower. Made and assembled in the USA, this magazine is backed by ProMag&';s lifetime guarantee against manufacturer&';s defects. Product Highlights 5-round capacity AR-15 magazine for .223 Remington / 5.56x45mm rifles-ideal for range use and hunting-compliant capacity needs Rugged heat-treated steel magazine body for strength and long service life Precision-wound, heat-treated chrome silicon wire spring for consistent feeding performance Polymer follower designed to promote reliable cartridge presentation and smooth operation Made and assembled in the USA and backed by a lifetime guarantee against manufacturer&';s defects Specs Brand Name: ProMag Industries Manufacturer Part Number: COL19 UPC: 708279005114 Product Type: Detachable rifle magazine Firearm Fit: AR-15 Caliber Compatibility: .223 Remington / 5.56x45mm Capacity: 5 rounds Body Material: Steel Spring: Heat-treated chrome silicon wire Follower: Polymer Color/Finish: Black (per source product name) Country of Manufacture/Assembly: USA Warranty: Lifetime guarantee against manufacturer&';s 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.