The 6ARC 18" MH is built for shooters who want a harder‑running, longer‑lasting ARC barrel without jumping to a full bull contour. Using our Medium‑Heavy profile, this barrel steps up to an .875" gas block journal — giving you the extra mass and rigidity an 18" ARC thrives on, especially for sustained strings, suppressed shooting, and precision work at distance.
At 48.3 oz, it has the backbone to stay steady when the heat ramps up. And if the weight has you second‑guessing, remember: we offer six fluting options to drop ounces, increase surface area, and make the barrel truly your own.
Hand‑lapped, stress‑relieved, and finished from our in‑house blanks, the 6ARC 18" MH is built to run all day without fading — the kind of barrel you can lean on for accuracy, consistency, and durability, shot after shot.
- 18" in length
- Rifle Gas System (Gas Tube Included)
- 6mm ARC Chamber
- 48.3 oz
- 1:7 Twist Rate
- Enhanced / Enlarged Feed Ramps
- CP House SS Blank
- .875" Gas Block
- Threads 5/8x24 with a 11° target crown
- Multiple Fluting Options to choose from
- Multiple Finish Options to choose from
Adding fluting or Cerakote to your barrel? Expect a 1-4 week turnaround for precision work and coating perfection.
For Cerakote Flutes Polish OD finish option, specify your desired Cerakote Color/Code in the checkout notes.
