ProMag COLA1 AR-15 Magazine 30rd 223/5.56 Blued Steel

The ProMag COLA1 delivers reliable feeding and robust construction for AR-15 platforms chambered in 223 Remington and 5.56x45mm NATO. This 30-round magazine features blued steel construction that withstands heavy use while maintaining consistent performance across training sessions and field applications.

What Makes This Different

Unlike polymer alternatives, the COLA1's blued steel body resists cracking under temperature extremes and maintains dimensional stability over thousands of loading cycles. The steel construction provides superior strength at the magazine catch engagement point, reducing wear on both the magazine and rifle. Heat-treated steel components ensure the magazine retains its shape and feeding geometry even after extended use.

Key Features

• 30-round capacity for 223 Remington and 5.56x45mm NATO cartridges
• Blued steel construction resists corrosion and environmental damage
• Compatible with standard AR-15 lower receivers and variants
• Heat-treated steel spring maintains consistent tension
• Reinforced steel lips prevent deformation during loading
• Standard STANAG 4179 dimensions ensure universal fit
• Removable floorplate for maintenance and cleaning

Field testing demonstrates reliable cycling through semi-automatic and select-fire platforms across temperature ranges from -20°F to 140°F. The magazine functions consistently with various bullet weights from 55-grain FMJ to 77-grain match ammunition. Competition shooters appreciate the predictable feeding characteristics, while tactical users rely on the magazine's resistance to impact damage and environmental contamination.

Technical Specs

• Capacity: 30 rounds
• Caliber: 223 Remington/5.56x45mm NATO
• Construction: Blued carbon steel body
• Overall Length: 7.1 inches
• Weight: 4.2 ounces (empty)
• Compatibility: AR-15, M16, and STANAG platforms
• Finish: Blued steel with corrosion resistance
• Spring: Heat-treated steel with anti-tilt follower

The COLA1 represents proven magazine technology adapted for modern sporting rifles. Steel construction costs more than polymer but delivers measurable advantages in longevity and reliability. Professional users who demand consistent performance choose steel magazines for their resistance to damage and dimensional stability.