Centurion Arms FBI 5.56 11.5" Cold Hammer Forged Barrel - HFB-FBI-11.5

Upgrade your AR-15 with the Centurion Arms FBI 5.56 11.5″ Cold Hammer Forged Barrel, engineered for elite performance in tactical scenarios. Designed in collaboration with federal law enforcement, this premium barrel delivers exceptional accuracy, durability, and reliability, making it the go-to choice for professionals and enthusiasts building compact, high-performance rifles.

Key Features

• Cold Hammer Forged Construction: Crafted from high-grade 4150 Chrome Moly Vanadium steel using advanced hammer forging, ensuring a smoother bore for superior accuracy and extended barrel life—ideal for high-round-count applications.
• Optimized for Suppressed Use: The carbine-length gas system and .750″ gas journal with alignment notch pair seamlessly with tabbed low-profile gas blocks, reducing gas blowback and providing a softer shooting experience when suppressed.
• Enhanced Muzzle Velocity: Tapered bore design boosts velocity without sacrificing control, perfect for close-quarters maneuvers where every shot counts.
• Heavy Profile for Stability: Maintains rigidity during rapid fire, minimizing heat distortion and preserving pinpoint precision even in demanding conditions.

Specifications

• Caliber: 5.56 NATO
• Barrel Length: 11.5 inches
• Gas System: Carbine
• Twist Rate: 1:7 RH—stabilizes a wide range of projectiles, from 55gr M193 to heavier 77gr loads
• Muzzle Threads: 1/2×28
• Finish: Manganese Phosphate for corrosion resistance
• Platform Compatibility: AR-15
• Weight: 23.5 oz

Why Choose the Centurion Arms FBI Barrel?

This barrel addresses common pain points in short-barreled AR-15 builds, such as over-gassing and reduced accuracy under stress. Users praise its flawless gas tuning that cycles reliably with or without suppressors, eliminating the need for extensive adjustments. Whether you’re assembling a personal defense weapon (PDW) or a duty rifle, the FBI barrel’s machine-gun-grade steel withstands thousands of rounds while delivering sub-MOA groups—transforming your setup into a battle-ready powerhouse without compromising on compactness.

Elevate your build today with the Centurion Arms FBI 5.56 11.5″ Cold Hammer Forged Barrel. Experience the difference in precision and endurance that top-tier craftsmanship provides—order now and take your AR-15 to the next level.

Frequently Asked Questions

Q: Is this barrel suitable for suppressed AR-15 configurations?
A: Absolutely. Its carbine gas system and .750″ journal are optimized for low-profile tabbed gas blocks, minimizing excessive gas when running a suppressor for cleaner, more comfortable shooting.

Q: What ammunition performs best with the 1:7 twist rate?
A: The 1:7 twist excels with heavier bullets like 62gr and 77gr for long-range accuracy, but it handles lighter 55gr M193 flawlessly for general use.

Q: How does the cold hammer forging benefit this barrel over standard button-rifled options?
A: CHF creates a denser, more uniform bore for improved accuracy, velocity, and longevity—resisting wear better in high-volume or suppressed fire scenarios.