The KCI USA KCI-MZ001 100 Round Drum Magazine offers unparalleled performance for AR-15 enthusiasts. Engineered for optimal functionality with 5.56x45mm and 223 Remington rounds, this magazine ensures dependable feeding. Built with a dual follower design, it maintains balance during firing, making it an ideal choice for competitive and tactical situations. The robust steel-reinforced feed lips guarantee durability and longevity, while the included loader and pouch enhance portability. Compatibility: AR-15 / M16 / M4 Caliber: 5.56x45mm / 223 Remington Capacity: 100 Rounds Body Material: Polymer / Steel Spring Material: Music Wire Choose the KCI USA 100 Round Drum Magazine for reliability and performance in the field.