Hodge Defense 12.5" AR-15 5.56MM Carbine Barrel. Genuine Hodge Defense Barrels built by FN to meet Hodge Defense specs! This barrel being used on the Hodge AU Mod 2 rifles. Utilizing FN's proprietary steel and technology, these barrels were designed to Jim Hodge's demanding specifications and optimized for the military's M855A1 EPR ammunition which is much 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; whereas previous ammunition was being criticized for being unstable and not providing consistent performance outside of a narrower optimal range.
The AU Mod 2 has been optimized for running M855A1 EPR, and this barrel is at the heart of that system.
Note: this barrel is designed for hot 5.56 NATO ammunition and suppressor use.
The cold-hammer forged and chrome-lined barrels are designed for hard use and extended life. The Hodge barrels run an "interference fit" -- so to speak. Meaning the upper receiver needs to be heated in order to install the barrel extension into the upper. This results in a more rigid fit and better accuracy!