Experience reliable performance and enhanced accuracy with the Green Mountain 6.8 SPC AR-15 Barrel 16″ M4 Phosphate. Designed specifically for the AR-15 platform, this precision-engineered barrel delivers the power of the 6.8 SPC cartridge in a compact, carbine-length configuration ideal for tactical applications, home defense, and range use.
Key Features
- M4 Profile Construction: The classic M4 contour provides an optimal balance of weight and rigidity, reducing overall rifle heft while maintaining structural integrity under sustained fire.
- Phosphate Finish: Mag phosphate coating offers superior corrosion resistance and a low-glare, tactical appearance that withstands harsh environments.
- Carbine Gas System: Ensures reliable cycling and smooth operation in shorter barrel setups, minimizing recoil and improving shooter control.
- 1:11 Twist Rate: Optimized for stabilizing a wide range of 6.8 SPC bullet weights, promoting consistent accuracy and velocity.
- 5/8×32 Muzzle Threads: Allows easy attachment of muzzle devices, brakes, or suppressors for customized performance.
Specifications
- Barrel Length: 16 inches
- Gas Block Journal: 0.75 inches
- Platform: AR-15
- Cartridge Compatibility: 6.8 SPC
- Gas System: Carbine length
- Finish: Mag Phosphate
- Twist Rate: 1:11
- Weight: 30 oz
Why Choose This Barrel?
Whether building a new upper or upgrading an existing AR-15, this barrel addresses common shooter needs for durability, compatibility, and precision. The M4 profile and carbine gas system solve issues with excessive weight and unreliable cycling in compact setups, while the phosphate finish protects against rust without adding bulk. Built from high-quality materials by Green Mountain, it provides a dependable foundation for your 6.8 SPC build.
Upgrade your AR-15 with this versatile barrel to achieve superior handling and performance in any scenario.


