Product Description The KCI USA 100-round drum magazine is built for AR-15 pattern firearms chambered in 5.56x45mm or .223 Remington, helping you spend more time shooting and less time reloading. Its dual-drum design feeds alternately from the left and right sides using two independent follower belts to help maintain a balanced center of gravity while firing. For dependable durability, the magazine features steel-reinforced feed lips for reliable feeding. Each package includes the drum, operator&&';;s manual, carrying pouch, graphite lubricant, and loader. Product Highlights 100-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 help keep handling balanced while firing Steel-reinforced feed lips for added durability and consistent feeding Polymer/steel construction with music wire spring for reliable function Includes carrying pouch, loader, graphite lubricant, and operator&&';;s manual Specs Brand: KCI USA Manufacturer Part Number: KCI-MZ001 UPC: 851586008016 Compatibility: AR-15 / M16 / M4 Caliber: 5.56x45mm NATO / .223 Remington Capacity: 100 rounds Body Material: Polymer / Steel Feed Lips: Steel reinforced Spring Material: Music wire Approx. Weight: 2.2 lb unloaded; 5 lb loaded Country of Manufacture: Korea In the Box: Drum magazine, operator&&';;s manual, carrying pouch, graphite lubricant, loader Notes: Lifetime warranty voided if customer disassembles magazine; not designed for use with hollow point ammo 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.