Green Mountain 7.62x39 AR-15 Barrel 8.5" M4 Nitride - GM-M42
$169.95
Only 2 left in stock
Build a compact and reliable 7.62×39 AR-15 platform with the Green Mountain 8.5″ M4 Nitride barrel. Designed for pistol-length gas systems, this barrel delivers exceptional performance in short configurations while maintaining the accuracy and durability enthusiasts demand from Green Mountain products.
Key Features
- Nitride/Melonite finish provides superior corrosion resistance and reduced friction for extended service life in demanding conditions.
- M4 profile offers an optimal balance of strength and reduced weight for maneuverable builds.
- 1:8 twist rate stabilizes a wide range of 7.62×39 projectiles, including heavier bullets for improved long-range accuracy potential.
- Pistol-length gas system ensures reliable cycling even in ultra-short barrel setups.
- 0.75″ gas block journal and 5/8×24 muzzle threads provide broad compatibility with standard accessories and suppressors.
Specifications
- Barrel Length: 8.5 inches
- Cartridge Compatibility: 7.62×39
- Platform: AR-15
- Finish: Nitride / Melonite
- Barrel Profile: M4
- Gas System: Pistol Length
- Twist Rate: 1:8
- Muzzle Thread: 5/8×24
- Gas Block Journal: 0.75 inches
- Weight: 22 ounces
Why Choose This Product
Whether you’re assembling a compact pistol build or a versatile short-barreled rifle, this Green Mountain barrel addresses common challenges like reliability in short gas systems and barrel longevity. The nitride treatment enhances heat dissipation and eases cleaning, while the precise 1:8 twist supports consistent accuracy across various ammunition types. Its M4 contour helps control weight without sacrificing rigidity, making it ideal for tactical or recreational use where maneuverability matters.
Engineered from quality 4150-series steel (standard for Green Mountain barrels), this component integrates seamlessly into AR-15 uppers chambered for 7.62×39, providing a solid foundation for custom firearms that prioritize performance and dependability.
Invest in precision engineering that elevates your next build.
| Weight | 22 oz |
|---|---|
| Dimensions | 8.5 in |
| Finish | Nitride / Melonite |
| Barrel Profile | M4 |
| Cartridge Compatibility | 7.62×39 |
| Gas Block Journal | 0.75 |
| Barrel Length | 8.5" |
| Gas System Length | Pistol |
| Platform | AR-15 |
| Twist Rate | 1:8 |
| Muzzle Thread Pattern | 5/8×24 |
| MPN | GM-M42 |
| UPC | 33789 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
