CMMG 55DC70A 5.56x45mm NATO 16.10″ AR-15 Barrel Sub-Assembly

The CMMG 55DC70A Barrel Sub-Assembly is a high-quality component designed for AR-15 enthusiasts looking to build a custom upper group. This barrel sub-assembly features a 16.10-inch length and is chambered in 5.56x45mm NATO, making it a versatile choice for various shooting applications. Constructed from durable 4140 chromoly steel, it boasts a black nitride finish for enhanced corrosion resistance and longevity.

Key Features

• 16.10-inch barrel length
• 5.56x45mm NATO chamber
• 4140 chromoly steel material
• Black nitride finish
• Medium taper profile
• Midlength gas system
• Includes M4 barrel extension

This barrel sub-assembly is designed with a medium taper profile and a midlength gas system, providing optimal balance and performance. The included M4 barrel extension is properly installed, ensuring reliability and ease of installation in your custom build. Explore this CMMG barrel sub-assembly at ICB Firearms, where we offer knowledgeable assistance and fast nationwide shipping.