Enhance your AR-15 build with the precision-engineered Green Mountain 9mm AR-15 Barrel. This 16-inch M4 profile barrel delivers reliable performance for pistol-caliber carbine enthusiasts seeking accuracy and durability in a blowback-operated platform.
Key Features
- Nitride (Melonite) finish for superior corrosion resistance and extended barrel life
- M4 contour profile balances weight and heat dissipation for comfortable handling during extended sessions
- 1:10 twist rate optimized for stabilizing 9mm projectiles across a wide range of bullet weights
- 1/2×36 muzzle threads compatible with popular 9mm suppressors and muzzle devices
- Blowback gas system design eliminates the need for a gas block, simplifying assembly
Specifications
- Platform: AR-15
- Cartridge: 9x19mm Parabellum
- Barrel Length: 16 inches
- Twist Rate: 1:10
- Finish: Nitride / Melonite
- Profile: M4
- Muzzle Thread: 1/2×36
- Gas System: Blowback
- Weight: 28 oz
Why Choose This Barrel
Built from high-quality steel and finished with advanced nitride treatment, this barrel resists wear from high-volume shooting while maintaining tight tolerances for consistent accuracy. The M4 profile provides a classic look and functional heat management, making it ideal for home defense, range training, or competition use. Its blowback operation ensures reliable cycling with standard 9mm ammunition without the complexity of a gas system.
Common Questions
- Is this barrel compatible with standard AR-15 lowers? Yes, it is designed specifically for the AR-15 platform in 9mm configurations.
- What ammunition performs best? It stabilizes most 115-147 grain 9mm loads effectively thanks to the 1:10 twist.
- Does it require a special upper receiver? A dedicated 9mm upper receiver with appropriate feed ramps is recommended for optimal function.
Upgrade your build today with this dependable Green Mountain barrel for enhanced accuracy and longevity in your 9mm AR-15 project.

