ProMag DRMA105 40-Round Drum Magazine .45 ACP Black Polymer

The ProMag DRMA105 40-round drum magazine transforms any compatible .45 ACP firearm into a high-capacity platform for extended shooting sessions. This black polymer drum eliminates frequent reloading interruptions during training, competition, or recreational shooting. Built with reinforced polymer construction and precision-engineered internals, it delivers consistent feeding performance across multiple firearm platforms.

What Makes This Different

Unlike standard stick magazines that max out at 14 rounds, this drum magazine holds 40 rounds of .45 ACP ammunition in a compact, manageable package. The spring-loaded follower system maintains consistent pressure throughout the entire capacity range, reducing feed failures common in other high-capacity designs. Heat-treated steel springs resist fatigue even after thousands of loading cycles, while the polymer body withstands impacts that would crack metal alternatives.

Key Features

• 40-round capacity reduces reload frequency during extended shooting sessions
• Reinforced black polymer construction weighs 40% less than steel equivalents
• Precision-molded feed lips ensure reliable cartridge presentation
• Spring-loaded follower maintains consistent feeding pressure
• Heat-treated coil springs rated for 5,000+ loading cycles
• Compatible with most .45 ACP firearms accepting standard magazines
• Easy-load design reduces thumb fatigue during magazine filling

Range testing demonstrates consistent cycling across various .45 ACP loads, from 185-grain target rounds to 230-grain defensive ammunition. The drum's low profile maintains weapon maneuverability while providing sustained fire capability for competitive shooting disciplines and training scenarios. Weather-resistant polymer construction performs reliably in temperatures from -20°F to 140°F, making it suitable for year-round outdoor use.

Technical Specs

• Capacity: 40 rounds .45 ACP
• Construction: High-impact polymer body with steel internals
• Weight: 1.2 pounds empty
• Dimensions: 4.5" diameter x 2.8" height
• Spring material: Heat-treated carbon steel
• Finish: Matte black polymer
• Compatibility: Most .45 ACP firearms with standard magazine wells
• Country of origin: USA

ProMag's DRMA105 drum magazine addresses the capacity limitations of standard .45 ACP magazines without sacrificing reliability or adding excessive weight. The precision manufacturing and quality materials justify the investment for shooters requiring sustained fire capability. Limited availability makes this a strategic addition to any .45 ACP ammunition feeding system.