The CMMG .22 ARC Barrel Sub-Assembly, 16.1-Inch (CMMG part no. 28D390C) is built for AR-15 shooters who want a .22 caliber round that reaches out farther for target shooting or varmint hunting. CMMG says the utility of 5.56mm is hard to beat, and the .22 ARC extends that reach on the same platform. This 16.1-inch medium taper barrel has a rifle-length gas port and a 1/2×28 muzzle thread, so it accepts the usual AR-15 muzzle devices. It is a ready-to-install starting point for a .22 ARC rifle build.

Key Specifications

• Chambered in .22 ARC, a .22 caliber cartridge aimed at target and varmint shooting.
• Barrel length is 16.1 inches, a standard rifle length.
• Rate of twist is 1:7.
• The contour is medium taper (MT).
• The barrel is 4140CM steel.
• The finish is nitride, for added hardness and corrosion resistance.
• The muzzle is threaded 1/2×28, the common AR-15 pitch.

Frequently Asked Questions

What is the muzzle thread on this .22 ARC barrel? It is threaded 1/2×28.

Which platform is it designed for? CMMG designs this 16.1-inch .22 ARC barrel for the AR-15 platform. It has a rifle-length gas port location.

What twist rate does it use? The barrel has a 1:7 twist.

Buy the CMMG .22 ARC 16.1-Inch Barrel Sub-Assembly

For a .22 ARC rifle build, a complete barrel sub-assembly with the right twist and thread saves a lot of sourcing. See more AR barrels in our catalog, then order from our Lubbock, Texas gun shop for fast, insured shipping.