FN America AR15 Barrel 16"BB M4 5.56 Carbine - 20-100046

Upgrade your AR-15 with the precision-engineered FN America AR15 Barrel 16″ BB M4 5.56 Carbine, a reliable choice for shooters seeking military-grade performance in a compact package. Crafted by FN America, renowned for supplying barrels to the U.S. military, this 16-inch M4 profile barrel delivers exceptional accuracy and durability, ensuring your rifle performs flawlessly during range sessions, tactical training, or defensive applications. With its 5.56 NATO chambering and carbine-length gas system, it balances velocity, recoil control, and maneuverability, making it ideal for modern AR-15 builds.

Key Features

• Button-Rifled Bore with 1:7 Twist: Provides stable rifling for optimal bullet stabilization across a wide range of 5.56 ammunition, from 55-grain FMJ to heavier 77-grain match loads, enhancing long-range accuracy without over-stabilizing lighter projectiles.
• Chrome-Lined Chamber and Bore: Offers superior resistance to heat and wear, extending barrel life even under high-volume fire, while promoting smoother extraction and reduced fouling for consistent reliability.
• M4-Style Feed Ramps and Barrel Extension: Ensures seamless feeding and ejection in M4-pattern rifles, minimizing malfunctions and allowing quick target reacquisition in dynamic shooting scenarios.
• Manganese Phosphate Finish: Delivers a matte black exterior that resists corrosion and oxidation, protecting the barrel in harsh environments while maintaining a low-profile, tactical aesthetic.
• 4150 CMV Steel Construction: Mil-spec material provides the strength needed for demanding use, with a government-profile design that sheds heat efficiently during sustained fire.

Technical Specifications

• Caliber: 5.56x45mm NATO
• Barrel Length: 16 inches
• Profile: M4
• Gas System: Carbine-length
• Twist Rate: 1:7 RH
• Threads: 1/2×28
• Weight: 32 oz
• Finish: Manganese Phosphate
• Material: 4150 Chrome-Moly Vanadium Steel

Why Choose the FN America 16″ M4 Barrel?

This barrel addresses common shooter concerns like inconsistent feeding, premature wear, and accuracy degradation by incorporating proven military specifications. Unlike basic barrels that falter under stress, the FN America’s chrome lining and robust construction handle thousands of rounds with minimal throat erosion, giving you confidence in every shot. It’s a drop-in upgrade for most AR-15 platforms, solving compatibility issues and enhancing overall rifle balance for improved handling. Shooters appreciate its ability to maintain sub-MOA groups with quality ammo, turning a standard build into a precision tool without the premium price tag of custom options.

Elevate your AR-15’s potential today with the FN America AR15 Barrel 16″ BB M4 5.56 Carbine. Order now to experience the difference in reliability and performance that only genuine FN quality can provide.

Frequently Asked Questions

Q: What type of ammunition is best suited for this barrel?
A: This 1:7 twist barrel excels with 5.56 NATO rounds, particularly 62-grain and heavier for optimal stabilization, but it handles 55-grain loads effectively for general plinking and training.

Q: Is this barrel compatible with my existing AR-15 upper receiver?
A: Yes, it’s designed for standard M4-pattern AR-15 uppers, featuring DPMS-compatible extensions for easy installation on most mil-spec platforms.

Q: Does the chrome lining make it suitable for suppressed shooting?
A: Absolutely—the chrome lining reduces carbon buildup, making it more suppressor-friendly while the carbine gas system manages increased backpressure efficiently.