Multi-caliber weapon system capable of swapping barrels and firing both 6.5 Creedmoor and 7.62 NATO rounds could reshape battlefield lethality, logistics, and future U.S. military small-arms doctrine.
The U.S. Special Operations Command (SOCOM) is preparing to field one of its most significant small-arms upgrades in decades, introducing a highly adaptable weapon system designed to increase battlefield flexibility, long-range lethality, and operational effectiveness across a wide range of combat environments.
Known as the MK24 Medium Range Gas Gun Assault (MRGG-A), the rifle represents far more than a standard replacement for an aging platform. Defense officials and industry representatives describe the weapon as a modular combat system capable of rapidly adapting to changing battlefield requirements through interchangeable barrels and multiple cartridge options.
The rifle is scheduled to begin fielding before the end of the current fiscal year and will eventually replace SOCOM’s MK17 SCAR rifle, according to officials familiar with the program.

















