Dirty Bird Bakersfield
Out of stock
Description
Upgrade your AR-15 build with the reliable Green Mountain 5.56 AR-15 Barrel 20″ M4 A2 Phosphate. Engineered for precision and durability, this government-profile barrel delivers consistent performance for tactical, competitive, or recreational shooting.
Key Features
- 20-inch length with rifle-length gas system provides optimal velocity and accuracy for 5.56 NATO ammunition
- Chrome-lined bore and chamber resists wear and corrosion while maintaining tight tolerances for extended service life
- Phosphate finish offers a durable, non-reflective exterior that protects against the elements
- 1:9 twist rate stabilizes a wide range of bullet weights for versatile shooting applications
- 0.75″ gas block journal and 1/2×28 muzzle threads accommodate standard accessories and suppressors
Specifications
- Platform: AR-15
- Cartridge: 5.56 NATO
- Barrel Profile: Government / SOCOM
- Finish: Phosphate + Chrome Lined
- Twist Rate: 1:9
- Gas System: Rifle length
- Muzzle Thread: 1/2×28
- Weight: 37.2 oz
Benefits for Shooters
This M4 A2-style barrel addresses common concerns like heat management and longevity. The chrome lining reduces fouling and extends barrel life during high-volume sessions, while the government profile balances weight and rigidity for improved handling. The 1:9 twist offers flexibility with both light and heavy projectiles, helping you achieve tight groups at the range without frequent re-zeroing.
Why Choose This Product
Green Mountain barrels are trusted in demanding environments for their consistent manufacturing standards. Whether you’re building a classic M4-style rifle or refreshing an existing upper, this 20″ option enhances accuracy and reliability without unnecessary bulk. Its rifle-length gas system ensures smooth cycling and reduced recoil for faster follow-up shots.
Pair this barrel with compatible handguards, gas blocks, and muzzle devices to complete a high-performing AR-15 platform built for real-world use.
Additional information
| Weight | 37.2 oz |
|---|---|
| Dimensions | 20 in |
| Finish | Phosphate + Chrome Lined |
| Barrel Profile | Government / SOCOM |
| Cartridge Compatibility | 5.56 NATO |
| Gas Block Journal | 0.75 |
| Barrel Length | 20 |
| Gas System Length | Rifle |
| Platform | AR-15 |
| Twist Rate | 1:9 |
| Muzzle Thread Pattern | 1/2×28 |
| MPN | GM-M17 |
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.
