Geissele CHF 5.56 Barrel

The Geissele CHF (Cold Hammer Forged) barrel represents the convergence of military manufacturing standards with precision engineering. These barrels utilize the same cold hammer forging process employed in the production of M4A1 barrels, creating a dense, stress-relieved bore structure that delivers exceptional durability alongside surprisingly good accuracy. The chrome-lined bore and chamber provide corrosion resistance and extended service life, making these barrels equally at home in duty applications and high-volume training environments.

Manufactured from Chrome Moly Vanadium steel using the proprietary Geissele Taper Profile, these barrels balance weight distribution to improve handling without sacrificing rigidity. The exterior features a manganese phosphate finish for traditional mil-spec durability, while the bore's chrome lining ensures longevity even under suppressor heat and adverse conditions. The 1:7 twist rate provides excellent stability for heavy 77gr match ammunition while still performing well with lighter 55gr loads.

What distinguishes Geissele's approach is the application of advanced surface treatments where they matter most. While the barrel exterior uses traditional phosphate, Geissele applies their exclusive Nanoweapon coating (developed by ARDEC) to components like flash hiders, bolt carrier groups, and cam pins. This durable solid lubricant coating has surface hardness approaching synthetic diamond, rejecting carbon buildup and allowing the system to run with less lubrication. The result is a complete upper that combines battle-proven barrel technology with modern material science for enhanced reliability and easier maintenance.