FN America AR-15 HF Barrel 18in 5.56mm Rifle - 36423

Elevate your AR-15 build with the FN America AR-15 HF Barrel 18in 5.56mm, a precision-engineered component crafted for unmatched durability and performance. As a cornerstone of tactical firearms, this hammer-forged barrel delivers superior accuracy and reliability, making it the ideal choice for enthusiasts and professionals seeking a rifle-length upgrade that stands up to rigorous demands.

Key Features

• Hammer-Forged Construction: Made from proprietary high-grade Chrome Moly Vanadium steel, the same material used in FN’s renowned machine gun barrels, ensuring exceptional strength and longevity under high-volume fire.
• Optimal 18-Inch Length: Provides the perfect balance of velocity and maneuverability for 5.56 NATO rounds, ideal for mid-to-long range shooting while maintaining a rifle-length gas system for smoother cycling and reduced recoil.
• 1:7 Twist Rate: Stabilizes heavier bullets for enhanced accuracy, allowing you to group tighter shots at extended distances without compromising on bullet weight versatility.
• Mag Phosphate Finish: Offers corrosion resistance and a classic matte look that blends seamlessly with mil-spec AR-15 uppers, while facilitating easy maintenance in the field.

Technical Specifications

• Caliber: 5.56 NATO
• Barrel Length: 18 inches
• Gas System Length: Rifle
• Platform: AR-15
• Twist Rate: 1:7 RH
• Muzzle Thread Pattern: 1/2×28
• Gas Block Journal: 0.750 inches
• Finish: Manganese Phosphate
• Weight: 29.8 oz
• Profile: Government/M16 Contour

Why Choose the FN America HF Barrel?

In the world of AR-15 barrels, durability and precision are non-negotiable. This FN hammer-forged barrel addresses common pain points like premature wear and inconsistent accuracy by leveraging advanced cold hammer forging technology, which compresses the steel for denser, more uniform rifling. You’ll experience fewer malfunctions, better heat dissipation during extended sessions, and consistent performance that keeps you on target. Whether you’re customizing for competition, home defense, or range dominance, this barrel transforms your build into a reliable workhorse that outperforms standard options.

Don’t settle for less—integrate the FN America AR-15 HF Barrel into your setup today and unlock the full potential of your 5.56mm rifle. Precision engineering meets tactical excellence for the serious shooter.

Frequently Asked Questions

What is hammer forging and why does it matter?

Hammer forging involves compressing steel around a mandrel to create the rifling, resulting in a barrel that’s denser and more resistant to throat erosion. This translates to longer service life and maintained accuracy over thousands of rounds, far surpassing button-rifled alternatives.

Is this barrel compatible with standard AR-15 uppers?

Yes, designed for the AR-15 platform, it fits mil-spec upper receivers with a rifle-length gas system. The 0.750-inch gas block journal accommodates most low-profile gas blocks, ensuring straightforward installation.

What type of ammunition performs best with this barrel?

Optimized for 5.56 NATO, the 1:7 twist rate excels with 55-77 grain bullets, providing stable flight for a wide range of loads from training FMJ to match-grade precision rounds.