Cmmg Bbl 308win 12.5" Mc 4140cm Sbn

The Cmmg Bbl 308win 12.5" Mc 4140cm Sbn is a premium barrel solution designed specifically for operators and enthusiasts building a compact, high-performance MK3 upper receiver group. In tactical environments where maneuverability is paramount, this 12.5-inch barrel offers a significant reduction in overall length without sacrificing the hard-hitting terminal ballistics of the .308 Winchester cartridge.

Constructed from 4140 Chrome Moly steel, this barrel provides the structural integrity required to handle the high pressures of the .308 Win caliber. The Salt Bath Nitride finish is applied to both the interior and exterior surfaces, offering superior wear resistance and corrosion protection compared to traditional chrome lining. Each unit includes a properly installed barrel extension and is headspaced at the factory to ensure safe and reliable cycling right out of the box.

Professionals often choose this length for specialized roles where engagement distances vary but space is at a premium. When reviewing specifications for a custom build, compatibility is key, and this barrel is engineered to interface seamlessly with CMMG MK3 platforms and similar LR-308 configurations.