Warne MESIG54GR Sig P320 Magazine Extension +5 Rounds 9mm Gray

The Warne MESIG54GR Magazine Extension transforms standard Sig P320 magazines into higher-capacity platforms, adding five additional 9mm rounds without compromising reliability. This precision-machined extension integrates seamlessly with factory magazines, maintaining the pistol's balance and handling characteristics while extending tactical capability.

What Makes This Different

Unlike polymer alternatives that can crack under stress, this extension features CNC-machined 6061-T6 aluminum construction with hardcoat anodizing for maximum durability. The gray finish matches Sig's factory components, creating a cohesive appearance that looks factory-installed. Spring tension remains consistent across the extended capacity range, ensuring reliable feeding even under rapid-fire conditions.

Key Features

• Adds 5 rounds to standard Sig P320 9mm magazines
• 6061-T6 aluminum construction with hardcoat anodized finish
• Gray color matches Sig factory components
• CNC-machined for precise tolerances and smooth operation
• Compatible with all Sig P320 9mm magazine variants
• Maintains original magazine spring geometry
• Tool-free installation and removal

Range testing demonstrates consistent feeding across various 9mm loads, from 115-grain FMJ to 147-grain hollow points. The aluminum construction withstands repeated drops on concrete without damage, while the hardcoat finish resists wear from holster contact and magazine changes. Competition shooters report no feeding issues during extended strings of fire, and the extension maintains reliability in temperatures from -20°F to 140°F.

Technical Specs

• Material: 6061-T6 aluminum alloy
• Finish: Hardcoat anodized gray
• Capacity: Adds 5 rounds to base magazine
• Compatibility: All Sig P320 9mm magazines
• Weight: 0.8 oz
• Length: Extends magazine 0.75 inches
• Installation: Tool-free attachment
• Country of Origin: USA

This extension delivers the additional capacity serious shooters demand while maintaining the reliability Sig P320 owners expect. The precision manufacturing ensures consistent performance across thousands of rounds, making it suitable for duty carry, competition, and training applications.