The Faxon 10.5" SOCOM Pinned Gas Block Barrel eliminates one of the most time-consuming steps of a short-barrel build — properly pinning a gas block. Faxon pre-drills and notches the gas block journal, installs and aligns the low-profile gas block, and includes the retaining pin for a rock-solid gas system.

Built from 4150 CMV steel, button-rifled with a 1:8 twist, and finished inside and out in black nitride, this barrel delivers the accuracy, durability, and dependability required for high-volume use. Each barrel is stress relieved, air-gauge tested, MPI-inspected, and headspace verified in-house.

Key Benefits

• Factory-pinned gas block: Pre-drilled and aligned at the factory for maximum reliability and easy installation.
• Includes gas block and pin: Ready-to-install setup for your AR-15 upper build.
• SOCOM profile: Balances rigidity and weight for heat control under sustained fire.
• Carbine-length gas system: Proven reliability across short-barrel configurations.
• Durable finish: Nitride-treated 4150 CMV steel resists corrosion and wear.
• Precision manufacturing: Stress relieved, air-gauge tested, MPI inspected, and headspace checked in-house by Faxon Firearms.

Specifications

Frequently Asked Questions

Overview: Faxon 10.5" Pinned Gas Block SOCOM 5.56 Barrel

The Faxon Duty Series 10.5" SOCOM Profile Barrel with a factory-pinned gas block is the ultimate solution for builders seeking rugged reliability and straightforward installation. Built from 4150 CMV steel with a nitride finish, this barrel offers durability and precision in one package. Each barrel is stress relieved, air-gauge tested, MPI-inspected, and headspace verified to deliver the accuracy Faxon is known for.

Whether for a duty carbine, home-defense AR, or compact tactical rifle, this 10.5" SOCOM barrel provides optimal balance, recoil control, and long-term durability.