DuraMag AR-15 20rd Magazine 300 Blackout/5.56 Bronze Aluminum

The DuraMag AR-15 Speed magazine delivers reliable feeding performance for both 300 Blackout and 5.56/.223 ammunition in a 20-round aluminum construction. This bronze-finished magazine features enhanced geometry for consistent cycling across multiple caliber platforms.

What Makes This Different

Unlike standard GI magazines, the DuraMag Speed incorporates an advanced follower design with anti-tilt geometry that prevents binding during rapid fire sequences. The aluminum construction provides 40% more durability than polymer alternatives while maintaining the lightweight profile competitive shooters demand. Heat-treated aluminum walls resist deformation under sustained use, maintaining consistent spring tension through thousands of loading cycles.

Key Features

• Dual-caliber compatibility: 300 Blackout and 5.56/.223 Remington
• 20-round capacity with last-round bolt hold open functionality
• Bronze anodized aluminum construction resists corrosion and wear
• Enhanced anti-tilt follower prevents feeding malfunctions
• Reinforced feed lips maintain geometry under stress
• Standard STANAG 4179 compatibility with all AR-15 platforms
• Textured exterior surface provides secure grip during reloads

Field testing demonstrates consistent feeding reliability across temperature ranges from -20°F to 140°F. The magazine functions effectively in competitive shooting environments where rapid reloads are critical, while the corrosion-resistant finish maintains functionality in harsh outdoor conditions. Law enforcement agencies have adopted this magazine for duty use due to its proven reliability with both supersonic and subsonic ammunition loads.

Technical Specs

• Capacity: 20 rounds
• Caliber: 300 AAC Blackout, 5.56x45mm NATO, .223 Remington
• Construction: 6061-T6 aluminum alloy
• Finish: Bronze anodized Type III hard coat
• Overall Length: 7.1 inches
• Weight: 4.2 ounces empty
• Spring: Stainless steel, heat-treated
• Compatibility: All STANAG 4179 magazine wells

The DuraMag Speed magazine represents proven engineering focused on consistent performance rather than experimental features. Professional users choose this magazine when reliability cannot be compromised, making it the logical upgrade from standard-issue alternatives.