Magnum Research MR40 Eagle Series Magazine .40 S&W 11/rd Black Steel

The Magnum Research MR40 Eagle Series Magazine .40 S&W 11-round black steel is a purpose-built magazine engineered exclusively for the Magnum Research Eagle pistol platform. This steel-bodied magazine delivers reliable feeding and retention in the .40 Smith & Wesson caliber, making it essential for operators who demand verified compatibility and precision performance from their firearm accessories.

Built for the Magnum Research Eagle's striker-fire polymer-framed design, this 11-round magazine features black steel construction that resists corrosion during extended duty cycles. The compact footprint—measuring 3.05 x 1.35 x 5.5 inches and weighing just 0.21 lbs—ensures rapid magazine changes and efficient carry. Critical compatibility note: this magazine is engineered exclusively for the Fast Action Eagle platform and will not function in the Israeli-manufactured Baby Desert Eagle steel or polymer models, making product verification essential before purchase to avoid mismatched components.

This magazine serves law enforcement, armed security professionals, and serious civilian shooters who rely on the Magnum Research Eagle for duty or defensive applications. The 11-round capacity provides a balance between reload frequency and concealability, while the steel construction withstands the mechanical stress of high-round-count training and operational use. Tactical operators who shoot the Eagle platform understand that magazine reliability directly impacts performance under pressure—this OEM-specification magazine eliminates compatibility uncertainty.

The .40 S&W cartridge remains a standard in duty pistol roles due to its barrier penetration and terminal performance characteristics. Pairing genuine Magnum Research magazines with a factory Eagle platform ensures that feeding, extraction, and reliability remain within manufacturer specifications, critical for professionals who cannot tolerate equipment failures during training or deployment.