ProMag DRMA12 50rd Drum Magazine 9mm AR-15 Glock Compatible

The ProMag DRMA12 delivers extended firepower with its 50-round capacity, engineered specifically for AR-15 platforms using Glock-pattern magazines. This drum magazine transforms standard carbine setups into high-capacity systems without sacrificing reliability or adding excessive bulk.

What Makes This Different

Unlike traditional stick magazines that max out around 30 rounds, the DRMA12 provides nearly double the capacity in a compact drum configuration. The DuPont Zytel polymer construction offers superior impact resistance compared to standard polymer blends while maintaining a lightweight profile. Internal spring mechanisms utilize a dual-spring system that maintains consistent feeding pressure throughout the entire 50-round capacity, addressing the common failure point of single-spring drum designs.

Key Features

• 50-round capacity increases sustained fire capability for competition and training
• DuPont Zytel polymer construction provides chemical resistance and dimensional stability
• Compatible with AR-15 platforms configured for Glock-pattern magazines
• Dual-spring feeding system maintains consistent bolt hold-open function
• Low-profile design minimizes snag points during tactical movements
• Translucent side windows allow visual round count verification
• Steel reinforced feed lips prevent deformation under stress

Range performance demonstrates reliable cycling across various 9mm loadings from 115-grain FMJ to 147-grain subsonic rounds. The magazine functions effectively in both semi-automatic and rapid-fire scenarios, maintaining proper bolt lockback on the final round. Weather testing shows consistent operation in temperatures from -20°F to 140°F, with the Zytel material resisting warpage that affects cheaper polymer alternatives.

Technical Specs

• Capacity: 50 rounds of 9mm Luger
• Material: DuPont Zytel reinforced polymer body with steel components
• Compatibility: AR-15 platforms using Glock-pattern magazine wells
• Overall height: Approximately 4.2 inches when loaded
• Weight: 8.5 oz empty, 24 oz loaded
• Feed lips: Steel reinforced for durability
• Finish: Matte black polymer with anti-reflective properties
• Country of origin: United States

The DRMA12 addresses the capacity limitations that restrict extended training sessions and competitive events. Professional armorers recognize the engineering improvements over first-generation drum magazines, particularly the refined spring geometry that eliminates the feeding inconsistencies common in high-capacity designs.