Upgrade your AR-15 with the FN America AR15 Barrel 16″ HF M4 5.56 Carbine, a precision-engineered component built for unmatched reliability and performance in tactical applications. Crafted by FN America, renowned for supplying military-grade firearms, this cold hammer forged barrel delivers exceptional durability and accuracy, making it the ideal choice for custom builds or replacements that demand battle-proven quality.
Key Features
- Cold Hammer Forged Construction: Forged from high-grade Chrome Moly Vanadium steel, the same material used in FN’s legendary machine gun barrels, ensuring superior strength and resistance to wear during extended firing sessions.
- Chrome-Lined Bore and Chamber: Provides corrosion resistance and facilitates easy cleaning, extending the barrel’s lifespan even in harsh environments.
- M4 Profile Design: Balances weight and heat dissipation for optimal handling, perfect for carbine-length gas systems in dynamic shooting scenarios.
- M4-Style Feed Ramps: Enhances reliable feeding and extraction, reducing malfunctions and boosting overall firearm efficiency.
- Manganese Phosphate Finish: Matte black coating protects against external corrosion and oxidation, maintaining a professional appearance under rigorous use.
Specifications
- Barrel Length: 16 inches
- Caliber: 5.56 NATO
- Twist Rate: 1:7 right-hand, ideal for stabilizing a wide range of bullet weights from 55 to 77 grains
- Gas System: Carbine-length for balanced recoil and faster cycling
- Gas Block Journal: 0.75 inches
- Muzzle Threads: 1/2×28 for easy attachment of muzzle devices
- Platform: AR-15 compatible
- Weight: Approximately 32.32 oz
Why Choose This Product
This FN America barrel addresses common challenges faced by AR-15 enthusiasts, such as barrel wear from high-round counts or inconsistent accuracy in custom setups. Its robust construction handles full-auto rated stress without throat erosion, delivering sub-MOA potential with quality ammunition. Whether you’re building a defensive rifle, competition setup, or general-purpose carbine, this barrel enhances velocity, precision, and longevity, ensuring your firearm performs when it matters most. Install it confidently knowing it’s backed by FN’s heritage of innovation and reliability.
Ready to elevate your AR-15’s performance? Secure the FN America AR15 Barrel 16″ HF M4 5.56 Carbine today and experience the difference in craftsmanship and dependability.
Frequently Asked Questions
Is this barrel chrome-lined for better durability?
Yes, the bore and chamber are fully chrome-lined, providing excellent resistance to corrosion and simplifying maintenance after intensive use.
What gas system does it use, and is it compatible with standard AR-15 uppers?
It features a carbine-length gas system and is designed for seamless integration with mil-spec AR-15 platforms, including most upper receivers.
What’s the twist rate, and what ammo does it work best with?
The 1:7 twist rate excels with heavier 5.56 NATO bullets (62-77 grains), offering superior stabilization for tactical and long-range shooting.

