Out of stock
SKU: MGPMDRM-A71
UPC: 708279015519
The ProMag Ruger P91 .40 S&W Drum 50-round magazine delivers extended magazine capacity for operators and competitive shooters running the Ruger P91 platform. Built from a proprietary DuPont Zytel-based polymer body with a blue steel upper magazine tower, this drum magazine combines modern injection-molding precision with proven metallurgy to create a reliable, high-capacity feeding system.
ProMag magazines are manufactured using traditional stamping and welding of heat-treated high carbon steel combined with modern precision polymer injection molding of mil-spec compounds. The 50-round capacity addresses the need for sustained firepower during extended training sessions, qualification courses, and practical shooting disciplines where magazine changes introduce delays and operational friction. The polymer-and-steel construction balances weight savings with durability, and the design accommodates the .40 S&W cartridge's pressure curve without compromising feed reliability. Every unit is backed by a lifetime manufacturer's defect warranty, ensuring long-term confidence in the product's integrity.
This magazine serves shooters who demand extra capacity for range training, tactical courses, and sport shooting scenarios where traditional 15-round single-stack or dual-stack magazines require frequent reloads. The Ruger P91 platform—known for its .40 S&W chambering and service-pistol ergonomics—benefits significantly from extended-capacity options that reduce administrative handling time and maximize time-on-target during training blocks. The 50-round drum's footprint is larger than standard magazines but remains practical for bench use, support drills, and match environments where space permits.
In the .40 S&W market, high-capacity drum options remain relatively specialized. This ProMag design fills a gap for P91 owners seeking to maximize training efficiency and reduce the operational overhead of repeated magazine rotations. The combination of polymer body construction and steel feeding tower reflects industry best practices for drum-magazine reliability across high-round-count sessions.
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