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 Rifle, a precision-engineered component designed for superior performance and reliability. Crafted by FN America, renowned for military-grade firearms, this cold hammer-forged barrel delivers exceptional accuracy and durability, making it the ideal choice for tactical enthusiasts, competitive shooters, and hunters seeking enhanced velocity without excessive recoil.

Key Features

• Cold Hammer Forged Construction: Forged from high-grade Chrome Moly Vanadium (CMV) steel, this barrel offers unmatched strength and longevity, resisting wear even under intense use.
• Rifle-Length Gas System: Provides smoother cycling and reduced recoil compared to shorter systems, improving follow-up shots and shooter comfort during extended sessions.
• 1:7 Twist Rate: Optimally stabilizes heavier 62-77 grain bullets, ensuring tight groupings at mid-to-long ranges for versatile 5.56 NATO applications.
• Mag Phosphate Finish: Enhances corrosion resistance and eases cleaning, keeping your barrel performing flawlessly in harsh conditions.
• Threaded Muzzle (1/2×28): Compatible with a wide array of suppressors, muzzle brakes, and flash hiders to customize your setup.

Technical Specifications

• Caliber: 5.56 NATO / .223 Remington
• Barrel Length: 18 inches
• Gas Block Journal: 0.750 inches
• Gas System: Rifle length
• Platform: AR-15
• Twist Rate: 1:7 RH
• Muzzle Threads: 1/2×28
• Finish: Manganese Phosphate
• Weight: 29.8 oz
• Chrome-Lined Bore and Chamber: For improved accuracy and easier maintenance

Why Choose the FN America HF Barrel?

For shooters frustrated with inconsistent accuracy or premature barrel wear in standard AR-15 setups, this FN HF barrel addresses those pain points head-on. Its government-profile design balances weight for maneuverability while maximizing muzzle velocity—up to 50 fps more than 16-inch barrels—extending your effective range without compromising handling. Whether building an SPR-style rifle for precision shooting or upgrading a duty rifle for reliability, this barrel integrates seamlessly with mil-spec AR-15 components, delivering sub-MOA potential with match-grade ammo. Backed by FN’s legacy of innovation, it’s built to withstand thousands of rounds, ensuring your investment performs when it matters most.

Ready to transform your AR-15 into a top-tier performer? Add the FN America AR-15 HF Barrel 18in 5.56mm Rifle to your build today and experience the difference in precision and power.

Frequently Asked Questions

Q: Is this barrel compatible with standard AR-15 upper receivers?
A: Yes, it fits mil-spec AR-15 platforms with a 0.750-inch gas block journal, ensuring easy drop-in installation for most builds.

Q: Does the barrel come chrome-lined?
A: Absolutely, the bore and chamber are chrome-lined for enhanced durability, corrosion resistance, and consistent performance across various ammunition types.

Q: What type of ammunition performs best with this 1:7 twist?
A: It excels with 55-77 grain bullets in 5.56 NATO, providing optimal stabilization for both FMJ and match loads in tactical or precision scenarios.