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Hodge Defense HDSI 12.5″ Barrel 5.56 (0.0625 Gas Port)

Original price was: $425.00.Current price is: $399.00.

Hodge Defense 12.5″ 5.56mm Carbine Barrel is the barrel used on the Hodge AU Mod 2 rifles. Incorporating FN’s proprietary steel (the same steel used in the M249 SAW), these barrels were designed and made to Jim’s specifications and optimized for the  M855A1 EPR ammunition, which is far more demanding on barrels.

M855A1 rounds operate at about 62,000 PSI (over 55k from M855) and are designed to perform to an expected standard of terminal performance and barrier penetration over a broader range of engagement distances, previous ammunition was criticized for being unstable and not providing consistent performance outside of a narrow optimal range.

The AU Mod 2 is optimized for running M855A1 EPR, and this Hodge barrel is at the heart of the system.

  • Proprietary midweight profile (close to Government profile)
  • Military spec gas port optimized for use with 5.56 NATO spec ammo and suppressors
  • .750″ gas block journal
  • Standard carbine gas system
  • 1/2×28 threaded
  • Chrome lined, phosphate coated
  • 1lb 8.5oz in weight
  • 1:7 twist
  • M4 feed ramps
  • Made in the USA
  • 0.0625″ Gas Port

Once this barrel is assembled into a complete firearm, it becomes a regulated item by the National Firearms Act (NFA). Check with your local and state laws for any further regulatory requirements. The buyer is responsible for compliance of all NFA rules and applicable laws.


0.0625 gas port 12.5″ barrel used on AU Mod 2 HDSI rifles is optimized for suppressed use and M855A1 EPR, and best used with standard carbine spring,  H2 buffer, and standard bolt carrier. 

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