CMMG 33D190C 8.6 Blackout 16.10 in Nitride Barrel

The CMMG 33D190C Barrel Sub-Assembly is a purpose-built 16.10 inch barrel for 8.6 Blackout rifle builds. It is manufactured from 4140CM steel and finished with a corrosion-resistant nitride treatment. The barrel is compatible with CMMG Mk3 and DPMS Gen 1 High-Pattern LR-308 upper receivers and accepts 0.750 inch diameter gas blocks. A fast twist rate is specified to match the intended stabilization for the caliber.

Key Specifications

• The manufacturer is CMMG.
• The model is 33D190C Barrel Sub-Assembly.
• The caliber is 8.6 Blackout.
• The barrel measures 16.10 inches.
• The barrel is constructed from 4140CM steel.
• The finish is Nitride.
• The rate of twist is 1:3″.
• Compatible upper receivers include CMMG Mk3 and DPMS Gen 1 High-Pattern LR-308.
• The barrel accepts gas blocks with a 0.750 inch diameter.

This barrel sub-assembly is aimed at builders who require durable materials, a serviceable finish, and direct compatibility with established LR-308 platforms. With its nitride surface treatment and specified fitment dimensions, the CMMG 33D190C provides a straightforward foundation for assembling a reliable 8.6 Blackout rifle tailored to range and field use.