FN America AR15 Barrel 14.7" BB M4 5.56 Carbine - 20-100044

Upgrade your AR-15 with the precision-engineered FN America AR15 Barrel 14.7″ BB M4 5.56 Carbine, a premium component designed for tactical enthusiasts seeking unmatched reliability and performance. Crafted from high-quality U.S.-sourced Chrome Moly Vanadium steel, this button-rifled barrel delivers exceptional strength and accuracy, making it the ideal choice for building or enhancing a versatile carbine setup. Whether you’re optimizing for home defense, range training, or competitive shooting, this 14.7-inch M4 profile barrel balances maneuverability with the velocity needed for effective 5.56 NATO rounds.

Key Features

• Button Rifled Construction: Ensures smooth, consistent rifling for superior bullet stabilization and extended barrel life, reducing wear during high-volume fire.
• M4 Barrel Profile: Lightweight yet durable design minimizes overall rifle weight without sacrificing rigidity, perfect for dynamic shooting scenarios.
• Manganese Phosphate Finish: Provides robust corrosion resistance and easy maintenance, protecting against environmental elements in demanding conditions.
• 1:7 Twist Rate: Optimally stabilizes a wide range of bullet weights from 55 to 77 grains, enhancing accuracy with military-spec and match-grade ammunition.
• CARBINE Gas System: Delivers reliable cycling with standard AR-15 setups, minimizing recoil and improving follow-up shot speed.

Technical Specifications

• Barrel Length: 14.7 inches
• Caliber Compatibility: 5.56 NATO / .223 Remington
• Gas Block Journal: 0.750 inches
• Muzzle Thread Pattern: 1/2″ x 28 TPI
• Platform: AR-15
• Weight: Approximately 25 ounces
• Testing Standards: High Pressure Tested and Magnetic Particle Inspected for quality assurance

Why Choose the FN America 14.7″ M4 Carbine Barrel?

This barrel addresses common challenges faced by AR-15 builders, such as inconsistent accuracy or premature wear under stress. Its Mil-Spec compliant materials and rigorous testing ensure it performs flawlessly in adverse conditions, offering peace of mind for shooters who demand reliability. The 14.7-inch length provides a compact profile for close-quarters handling while maintaining sufficient velocity for 200+ yard engagements—ideal for those upgrading from longer barrels without losing ballistic efficiency. Paired with its threaded muzzle, it supports suppressors or muzzle devices, customizing your build to fit your tactical needs. Experience the battle-proven heritage of FN America, trusted by military professionals worldwide, and elevate your rifle’s potential today.

Frequently Asked Questions

Q: Is this barrel chrome-lined?
A: The FN America BB M4 barrel features button rifling without chrome lining, prioritizing smooth bore finish for accuracy while maintaining durability through its phosphate coating and quality steel construction.

Q: What gas system length is required?
A: This barrel is designed for a carbine-length gas system, ensuring reliable operation with most AR-15 upper receivers and bolt carrier groups.

Q: Can it handle both 5.56 NATO and .223 Remington ammunition?
A: Yes, the 5.56 NATO chamber safely accommodates both 5.56 NATO and .223 Remington rounds, offering versatility for various shooting applications.

Ready to enhance your AR-15’s performance? Integrate the FN America 14.7″ BB M4 5.56 Carbine Barrel into your build and discover the difference in precision and reliability.