Product Description The KCI USA AR-15 50-round drum magazine is designed for AR-15 pattern firearms chambered in 5.56x45mm NATO or .223 Remington. It feeds alternately from the left and right sides using two independent follower belts to help maintain a balanced center of gravity while firing. Built with a clear polymer drum body for quick visual round-count checks, it also features steel-reinforced feed lips for added durability and reliable feeding. Product Highlights 50-round drum magazine for AR-15 / M16 / M4 platforms in 5.56x45mm NATO and .223 Remington Alternating left/right feed design with dual follower belts to support balanced handling Clear polymer drum body helps you monitor ammunition status at a glance Steel-reinforced feed lips for durability and consistent feeding Includes accessories for operation and loading (manual, pouch, lubricant, and loader) Specs Brand: KCI USA Manufacturer Part Number: KCI-MZ036 UPC: 851586008054 Firearm Compatibility: AR-15 / M16 / M4 pattern Caliber: 5.56x45mm NATO / .223 Remington Magazine Capacity: 50 rounds Body Material: Polymer / Steel (steel-reinforced feed lips) Spring Material: Music wire Color/Finish: Clear drum body (per supplemental listing) Included Items: Operator&&';;s manual, carrying pouch, graphite lubricant, loader Ammo Note: Not designed to be used with hollow point ammo Warranty Note: Lifetime warranty voided if the customer disassembles the magazine 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.