Green Mountain 5.56 AR-15 Barrel 10.5" M4 Phosphate - GM-M26
$182.95
Only 1 left in stock
Upgrade your AR-15 build with the reliable Green Mountain 5.56 AR-15 Barrel 10.5″ M4 Phosphate. Engineered for precision and durability, this carbine-length barrel delivers consistent performance in tactical and range applications, helping shooters achieve tight groupings and dependable function even under demanding conditions.
Key Features
- Chrome-lined bore for superior corrosion resistance and extended barrel life, reducing maintenance needs during frequent use.
- M4 profile provides an optimal balance of weight savings and strength, making it ideal for lightweight builds without sacrificing rigidity.
- 1:7 twist rate stabilizes a wide range of 5.56 NATO and .223 Remington projectiles for enhanced accuracy across various ammunition types.
- Phosphate finish over chrome lining offers rugged protection against wear and environmental factors.
- 1/2×28 muzzle threads allow easy installation of compatible flash hiders, compensators, or suppressors.
Specifications
- Barrel Length: 10.5 inches
- Gas System: Carbine length with 0.75″ gas block journal
- Platform: AR-15
- Cartridge Compatibility: 5.56 NATO
- Finish: Phosphate with chrome-lined bore
- Weight: 23.2 ounces
Why Choose This Product
This Green Mountain barrel addresses common pain points for builders seeking a short-barreled option that maintains reliability. The carbine gas system and chrome lining promote smooth cycling and longevity, while the 1:7 twist ensures versatility for both duty and recreational shooting. Its M4 contour helps manage heat and recoil in rapid-fire scenarios.
Whether assembling a new SBR or refreshing an existing upper, this barrel provides the technical foundation for a high-performing firearm.
Common Questions
Install this barrel using standard AR-15 components and proper headspacing techniques for optimal results.
| Weight | 23.2 oz |
|---|---|
| Dimensions | 10.5 in |
| Finish | Phosphate + Chrome Lined |
| Barrel Profile | M4 |
| Cartridge Compatibility | 5.56 NATO |
| Gas Block Journal | 0.75 |
| Barrel Length | 10.5 |
| Gas System Length | Carbine |
| Platform | AR-15 |
| Twist Rate | 1:7 |
| Muzzle Thread Pattern | 1/2×28 |
| MPN | GM-M26 |
| UPC | 33749 |
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.
