NBS 20″ 6mm ARC 4150 Rifle Medium 1:7.5 Twist Nitride Barrel

Elevate your AR-15 build with the precision-engineered 20″ 6mm ARC 4150 Rifle Medium 1:7.5 Twist Nitride Barrel, designed for long-range accuracy and reliable performance. This barrel harnesses the power of the 6mm ARC cartridge, delivering exceptional ballistics in a compact AR platform. Whether you’re a competitive shooter or a dedicated hunter, this medium-profile barrel offers the perfect balance of weight, durability, and velocity retention for shots beyond 800 yards.

Key Features

• Premium 4150 Chrome Moly Vanadium Steel: Ensures superior strength and heat resistance, standing up to high-volume fire without compromising accuracy.
• Nitride/Melonite Finish: Provides corrosion resistance and reduces friction for smoother operation and extended barrel life.
• 1:7.5 Twist Rate: Optimally stabilizes heavier 6mm ARC projectiles (80-108 grains), maximizing downrange performance and wind resistance.
• Rifle-Length Gas System: Promotes smoother cycling and reduced recoil, ideal for precision setups.
• 5/8×24 Muzzle Threads: Compatible with a wide range of suppressors and muzzle devices to customize your setup.

Specifications

• Barrel Length: 20 inches
• Caliber: 6mm ARC
• Profile: Medium
• Gas Block Journal: 0.75 inches
• Platform: AR-15
• Weight: 26 ounces
• Finish: Nitride

Why Choose This 6mm ARC Barrel?

Struggling with inconsistent accuracy or excessive barrel weight in your AR-15? This 20-inch 6mm ARC barrel solves those issues by combining a medium contour for manageable carry weight with the rigidity needed for sub-MOA groups at extended ranges. The 4150 steel construction withstands rigorous training sessions, while the nitride treatment minimizes fouling for quicker cleanings and consistent shot-to-shot performance. Users appreciate how it transforms standard AR platforms into versatile long-range tools, outperforming traditional 5.56 setups in ballistics without the bulk of larger calibers. Perfect for varmint hunting, PRS competitions, or tactical applications where precision matters most.

Ready to upgrade your rifle? Invest in this high-quality AR-15 6mm ARC barrel today and experience the difference in your next range day or field outing.

Frequently Asked Questions

1. What bolt carrier group is compatible with this barrel?
This barrel requires a bolt with a 6.5 Grendel Type 2 bolt face for proper function with 6mm ARC ammunition.

2. Is this barrel a drop-in replacement for my AR-15?
Yes, it’s designed as a direct fit for AR-15 upper receivers, but ensure your gas system matches the rifle-length configuration for optimal reliability.

3. What ammunition performs best in this 1:7.5 twist barrel?
Heavier bullets from 80 to 108 grains excel, providing excellent stability and long-range accuracy with factory or handloaded 6mm ARC loads.