This 55-round drum magazine is designed for Ruger 10/22 and Charger .22 LR platforms, delivering high-capacity performance with reliable feeding. Constructed from durable, impact-resistant materials and precision components, it ensures long-lasting use and consistent operation for extended shooting sessions. Product Features High-capacity 55-round drum design Impact-resistant polycarbonate magazine body for durability Injection molded follower for smooth, consistent feeding Heat-treated chrome silicone wire spring for reliable performance Made in the USA Product Specifications Manufacturer: Pro Mag Model: Drum Magazine Caliber: .22 LR Magazine Capacity: 55 rounds Additional Features: Fits Ruger 10/22 and Charger rifles, polycarbonate construction