ProMag M1AA1 20-Round Magazine 308 Win/7.62 NATO Springfield M1A

The ProMag M1AA1 delivers reliable feeding and extended capacity for Springfield M1A and M14 rifles chambered in 308 Winchester and 7.62x51mm NATO. This blued steel magazine expands your rifle's capability beyond the standard 8-round en bloc clips with proven construction designed for consistent performance.

What Makes This Different

Unlike standard en bloc clips that require complete ejection after firing, this detachable box magazine allows tactical reloads while retaining partially loaded magazines. The blued steel construction provides corrosion resistance superior to parkerized finishes while maintaining the classic military aesthetic. Internal spring tension remains consistent across the full 20-round capacity, ensuring reliable feeding from first round to last.

Key Features

• 20-round capacity doubles standard M1A/M14 ammunition capacity
• Blued steel construction with anti-tilt follower design
• Compatible with Springfield M1A and military M14 rifles
• Chambers both 308 Winchester and 7.62x51mm NATO cartridges
• Heat-treated steel body withstands repeated loading cycles
• Polymer base plate prevents magazine damage during drops
• Standard GI-pattern magazine catch engagement

Range sessions and competitive shooting benefit from the extended capacity and quick reload capability. The magazine functions reliably in both semi-automatic civilian M1A rifles and select-fire military variants. Weather resistance comes from the blued finish, while the internal components maintain function in temperatures from -40°F to 140°F. Match-grade ammunition feeds as consistently as military ball rounds.

Technical Specs

• Capacity: 20 rounds
• Caliber: 308 Winchester/7.62x51mm NATO
• Material: Blued carbon steel body
• Compatibility: Springfield M1A, M14, M1A SOCOM variants
• Overall length: Approximately 8.5 inches
• Weight: 8.2 ounces empty
• Finish: Traditional blued steel
• Country of origin: United States

This magazine transforms the M1A platform from a traditional battle rifle into a more versatile tactical system. ProMag's manufacturing standards ensure consistent dimensions that maintain proper headspace and timing. Serious shooters recognize the value of reliable magazines that feed without hesitation when performance matters most.