The Faxon Duty Series 10.5" SOCOM Profile 5.56 NATO barrel blends compact handling with improved dwell and gas timing from a carbine-length system. Machined from certified 4150 CMV, button-rifled with a 1:8 twist, and finished inside and out with durable black nitride, this 10.5" SOCOM barrel is built for reliability, heat resistance, and consistent accuracy in duty and tactical carbines.

Key Benefits

• Optimized carbine length: 10.5" gives better dwell and gas timing compared to shorter pistol-length barrels for smoother, more reliable cycling.
• Duty-grade construction: 4150 CMV steel plus nitride finish for long life under hard use and corrosion resistance.
• Accuracy-focused details: Fully stress relieved, air-gauge tested, and finished with an 11° target crown for repeatable performance.
• Universal muzzle compatibility: 1/2-28 threading accepts common brakes, compensators, and direct-thread suppressor adapters.
• Robust gas compatibility: Carbine-length gas and .750" gas block journal support reliable operation across ammunition types.
• Strict quality control: Magnetic particle inspected, individually headspace-checked with hardened gauges.

Specifications

Why Choose Faxon Duty Series

From certified 4150 CMV bar stock to final inspection, each Faxon Duty Series barrel is manufactured and quality-checked in-house. The SOCOM profile increases thermal mass for better heat handling and longevity, while a carbine-length gas system offers improved dwell and more forgiving gas timing than shorter systems — translating to smoother function and reduced cyclic harshness in many setups.

Installation & Compatibility

• Compatible with standard AR-15 upper receivers and bolts using the M4 barrel extension.
• Use a .750" gas block (set-screw or clamp-on) on the 1.9" journal.
• Confirm muzzle device/suppressor compatibility with 1/2-28 threading. Always verify suppressor caliber rating.
• For optimal reliability, tune buffer/spring and gas settings to your specific ammunition and muzzle device.

Frequently Asked Questions

Overview: Why this is a top 10.5" 5.56 Barrel for AR-15 Carbines

For shooters building a compact carbine, the right barrel is about balance: compact external length with internal geometry that supports reliable cycling and consistent accuracy. The Faxon Duty Series 10.5" SOCOM Profile 5.56 NATO barrel is purpose-built to meet that need. At 10.5 inches, the carbine-length gas system provides more dwell time than pistol-length setups, which often translates into smoother gas delivery, easier gas tuning, and improved reliability with a wider range of ammunition and muzzle devices.

This barrel starts with certified 4150 CMV steel and is button-rifled to a versatile 1:8 twist, stabilizing most 55–77 grain projectiles commonly used in defensive, duty, and match scenarios. Each unit is fully stress relieved to reduce point-of-impact shifts over the life of the barrel, then treated with a robust black nitride finish inside and out for enhanced wear resistance and corrosion protection. Faxon’s quality procedures — including air-gauge testing, magnetic particle inspection, and individual headspace checks with hardened gauges — ensure every barrel leaves the shop ready to perform.

The SOCOM profile gives additional mass where needed for heat management and endurance without adding unnecessary bulk. Standard 1/2-28 muzzle threads accept a broad range of muzzle devices and direct-thread adapters for suppression or recoil control. A .750" gas block journal and 1.9" journal length make the barrel compatible with popular gas blocks and installation methods.

Whether you’re building a patrol carbine, a compact duty rifle, or a short-barrel personal defense weapon, the Faxon Duty Series 10.5" SOCOM 5.56 barrel delivers a tested mix of durability, service-grade performance, and real-world reliability. Backed by in-house manufacturing and strict QC, it’s a smart choice when you need a compact barrel that performs under pressure.