20" 6mm ARC 4150 Rifle Medium 1:7.5 Twist Nitride Barrel - 6ARCR20MED50B7.5T2
In stock
20″ 6mm ARC 4150 Rifle Medium 1:7.5 Twist Nitride Barrel
Stretch your shots. Stay light. Shoot true.
The 20″ 6mm ARC Rifle Barrel is designed for shooters pushing their AR-15 platform well past traditional 5.56 capabilities. Made from 4150 Chrome Moly Vanadium steel and treated with a durable nitride finish, this barrel delivers outstanding heat resistance, corrosion protection, and smooth operation over extended use.
Optimized for long-range precision, the 1:7.5 twist rate is ideal for stabilizing heavy 6mm ARC projectiles (80–108 gr), making it a top choice for PRS, hunting, or DMR builds. The rifle-length gas system ensures smoother recoil and more consistent cycling, while the medium profile balances stiffness and weight for repeatable accuracy. Threaded 5/8×24, it’s suppressor-ready right out of the box.
Features
- 4150 CrMoV Steel – Built for strength, heat tolerance, and longevity
- Black Nitride Finish – Corrosion-resistant and low-maintenance
- 1:7.5 Twist Rate – Ideal for heavy, high-BC 6mm ARC bullets
- Rifle-Length Gas System – Smooth cycling and reduced recoil
- Medium Contour – Balanced for precision and manageable weight
- 5/8×24 Threaded Muzzle – Suppressor and brake compatible
Specifications
- Caliber: 6mm ARC
- Barrel Length: 20″
- Twist Rate: 1:7.5 RH
- Gas System: Rifle Length
- Gas Block Journal: 0.750″
- Muzzle Thread: 5/8×24
- Profile: Medium
- Finish: Nitride / Melonite
- Platform: AR-15
- Weight: 26 oz
- Origin: Made in the USA
| Weight | 26 oz |
|---|---|
| Dimensions | 22 × 3 × 3 in |
| Finish | Nitride / Melonite |
| Barrel Profile | Medium |
| Cartridge Compatibility | 6mm ARC |
| Gas Block Journal | 0.75 |
| Barrel Length | 20 |
| Gas System Length | Rifle |
| Platform | AR-15 |
| Twist Rate | 1:7.5 |
| Muzzle Thread Pattern | 5/8×24 |
| MPN | 6ARCR20MED50B7.5T2 |
| UPC | 28364 |
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.
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