Green Mountain 7.62x39 AR-15 Barrel 16.5" M4 Nitride - GM-M46

Upgrade your AR-15 build with the reliable Green Mountain 7.62×39 AR-15 Barrel in a 16.5-inch M4 nitride finish. Designed specifically for the 7.62×39 cartridge, this precision barrel delivers consistent accuracy and durability for tactical, range, and defensive applications.

Key Features

• Nitride (Melonite) finish provides superior corrosion resistance and a smooth bore that maintains tight tolerances for enhanced longevity and accuracy without the buildup issues common in chrome-lined barrels.
• M4 profile offers a balanced weight distribution and heat dissipation ideal for sustained fire while maintaining the classic AR-15 handling characteristics.
• 1:8 twist rate stabilizes a wide range of bullet weights, including heavier 7.62×39 loads for improved ballistic performance downrange.
• Carbine-length gas system ensures reliable cycling with standard 7.62×39 ammunition in semi-automatic AR-15 platforms.
• 5/8×24 muzzle threads allow easy attachment of compatible muzzle devices, flash hiders, or suppressors.

Technical Specifications

• Barrel length: 16.325 inches (listed as 16.5 inches)
• Overall length: 18.5 inches
• Gas block journal: 0.75 inches
• Platform: AR-15
• Weight: 30 ounces
• Finish: Nitride/Melonite

Why Choose This Green Mountain Barrel

Green Mountain barrels are manufactured with tight tolerances to address common shooter concerns like inconsistent accuracy, rapid wear, and gas system reliability. The nitride treatment eliminates the need for chrome lining while providing a harder, more uniform bore surface that resists fouling. This results in tighter groups, easier cleaning, and extended service life—key benefits for serious builders seeking dependable performance from their 7.62×39 AR-15.

Whether you’re assembling a dedicated 7.62×39 upper or replacing an existing barrel, this component integrates seamlessly with standard AR-15 receivers and carbine gas systems.

Invest in precision engineering that prioritizes real-world reliability and accuracy for your next build.