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CMMG M4 Uppers

CMMG M4 Uppers

CMMG Transitioning to COLD HAMMER FORGED BARRELS
The cold hammer forge process offers distinct advantages. The process reduces the outside diameter of the barrel without removing material. This increases the density of the steel, making it stronger and more rigid. The crystalline structure of the steel is realigned to the desired rifle twist. Finally pulling a button broach through the barrel creates tiny pot and tear marks through the bore; whereas the hammer forging process leaves a super smooth surface throughout the bore, offering less resistance on the projectile. Made In USA..