ProMag COL19 5-Round AR-15 Magazine 223 Rem/5.56 NATO Blued Steel

The ProMag COL19 Standard magazine delivers reliable feeding for AR-15 platforms in states requiring reduced capacity compliance. This 5-round magazine accommodates both .223 Remington and 5.56x45mm NATO cartridges with consistent performance across various rifle configurations.

What Makes This Different

Unlike polymer alternatives, the COL19 features heat-treated blued steel construction that maintains dimensional stability under extended use. The magazine body resists deformation from loaded storage and provides superior feed lip durability compared to standard aluminum options. Anti-tilt followers ensure smooth cartridge presentation to the chamber, reducing feed-related malfunctions by approximately 40% over basic military surplus magazines.

Key Features

• Heat-treated blued steel body for maximum durability and corrosion resistance
• 5-round capacity meets restricted state compliance requirements
• Compatible with .223 Remington and 5.56x45mm NATO ammunition
• Anti-tilt follower design prevents cartridge binding and double feeds
• Standard STANAG 4179 dimensions fit all AR-15 pattern rifles
• Removable floor plate allows complete disassembly for maintenance
• Witness holes provide visual round count verification

Field testing demonstrates consistent feeding through temperature ranges from -20°F to 140°F without spring tension loss. The magazine functions reliably in precision shooting applications where single-loading between shots is impractical. Competition shooters appreciate the reduced weight compared to standard 30-round magazines during extended matches, while hunters benefit from the compact profile in tight shooting positions.

Technical Specs

• Capacity: 5 rounds (.223 Rem/5.56x45mm NATO)
• Material: Heat-treated blued steel body with steel spring
• Overall Length: 4.75 inches
• Width: 1.18 inches
• Weight: 4.2 ounces (empty)
• Compatibility: All AR-15/M16 pattern rifles and carbines
• Follower: Anti-tilt polymer construction
• Country of Origin: United States

The COL19 addresses the specific needs of shooters in capacity-restricted jurisdictions without compromising reliability or build quality. ProMag's steel construction and proven follower design provide confidence for both recreational shooting and professional applications where magazine failure is not acceptable.