FN America AR-15 HF Barrel 20in 5.56mm Rifle

Upgrade your AR-15 with the precision-engineered FN America AR-15 HF Barrel 20in 5.56mm, a hammer-forged powerhouse designed for superior performance and reliability. Crafted from high-grade Chrome Moly Vanadium steel—the same material used in FN’s legendary machine gun barrels—this 20-inch rifle-length barrel delivers exceptional accuracy and velocity for long-range shooting enthusiasts and tactical operators alike. Whether you’re building a custom rifle or replacing a worn component, this barrel ensures consistent grouping and enhanced muzzle energy, turning your AR-15 into a versatile platform for target practice, competition, or defensive applications.

Key Features

• Hammer-Forged Construction: Cold hammer-forged for unmatched durability and resistance to wear, providing a lifetime of reliable service even under high-round counts.
• Optimized 1:7 Twist Rate: Stabilizes heavier bullets for improved long-range accuracy, ideal for 55-77 grain projectiles in 5.56 NATO.
• Rifle-Length Gas System: Reduces recoil impulse and enhances reliability, promoting smoother cycling and extended barrel life.
• Manganese Phosphate Finish: Offers corrosion resistance and facilitates easy cleaning, maintaining peak performance in adverse conditions.
• Standard Muzzle Threading: 1/2×28 pattern allows seamless attachment of suppressors, muzzle brakes, or flash hiders without modifications.

Technical Specifications

• Caliber: 5.56x45mm NATO / .223 Remington
• Barrel Length: 20 inches
• Gas System: Rifle Length
• Twist Rate: 1:7 RH
• Gas Block Journal: 0.750 inches
• Muzzle Threads: 1/2×28
• Finish: Mag Phosphate
• Platform Compatibility: AR-15
• Weight: Approximately 35.2 oz

Why Choose the FN America HF Barrel?

This barrel addresses common AR-15 builder challenges like inconsistent accuracy and premature wear by leveraging FN’s proven hammer-forging process, which creates a denser, stronger bore for tighter tolerances and better heat dissipation. Shooters appreciate the increased muzzle velocity—up to 3,100 fps with standard loads—extending effective range beyond 600 yards while minimizing barrel whip for enhanced precision. Compatible with most AR-15 uppers, it’s a drop-in solution that elevates your build without compromising on quality or safety.

Ready to experience the difference? Equip your AR-15 with the FN America HF Barrel today and unlock its full potential for superior shooting performance.

Frequently Asked Questions

Q: Is this barrel compatible with my standard AR-15 upper receiver?
A: Yes, this barrel is designed for seamless integration with mil-spec AR-15 platforms, ensuring a straightforward installation for most builds.

Q: What benefits does the 1:7 twist rate provide?
A: The 1:7 twist excels at stabilizing heavier 5.56 bullets (62-77 grains), improving accuracy and terminal ballistics for long-distance engagements.

Q: How does the hammer-forged design improve durability?
A: Hammer forging compresses the steel at a molecular level, resulting in a barrel that’s more resistant to throat erosion and maintains accuracy longer than conventionally rifled options.