$198.99
3 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
The 6mm ARC has been gaining real momentum with serious AR builders and field users who want serious ballistic performance without jumping to a 20-inch barrel or bigger platform. This CMMG barrel delivers on that promise. It's a well-engineered component built specifically for Hornady's 6mm ARC cartridge, not a round-hole compromise that sort of works with the cartridge.
The 416 stainless construction means durability and corrosion resistance in the barrel steel itself. The salt bath nitride finish adds another layer of protection, hardening the exterior to resist wear and corrosion from real use in varying conditions. That finishing process is something you'll notice when you handle the barrel—the black color is uniform and smooth, not just painted on. At 1 pound 15 ounces, the medium taper profile keeps things from getting too heavy, which matters when you're looking at a compact 16-inch build where every ounce matters for handling.
This twist rate isn't arbitrary. The 1:7.5 spin was identified by Hornady engineers as the ideal rate for stabilizing the full range of 6mm ARC loadings, particularly the heavier match-grade bullets in the 103 to 110-grain range that maximize the cartridge's ballistic performance at distance. If you're planning to run factory Hornady ammo or develop your own loads with popular precision bullets, this twist rate gives you the flexibility to use everything from lighter target rounds to the heavy stuff without fouling up your ballistics.
This is a barrel sub-assembly, which means it arrives with the M4 barrel extension already installed and properly headspaced. No guessing, no secondary headspacing tools needed—you can get straight to fitting it into your receiver and building out the rest of your upper. The muzzle end is threaded at 5/8×24 TPI, the standard for most 6mm ARC suppressors and muzzle devices, so adding a brake, flash hider, or can doesn't require adapter rings. The rifle-length gas port and 0.750" gas block journal pair well with a rifle-length gas system, which tends to run smoother than mid-length setups on longer barrels and can help manage backpressure if you're running suppressed.
Yes. All CMMG barrel sub-assemblies arrive properly headspaced from the factory. The M4 barrel extension is already installed, so you can fit it directly into your upper receiver without needing secondary headspacing tools or work. Just make sure your bolt matches the barrel's headspace specification.
The 1:7.5 twist is ideal for the heavier 6mm ARC match bullets in the 103 to 110-grain range, which is where the cartridge really shines for distance shooting. Factory Hornady ammo and most precision-oriented reloads will work great. You can run lighter bullets too, but this twist rate was specifically tuned for the high-ballistic-coefficient projectiles that give 6mm ARC its long-range edge.
This barrel is configured for a rifle-length gas system with a .750" gas block journal. Rifle-length systems tend to cycle smoother on 16-inch barrels compared to mid-length setups, and they handle suppressed fire better if you plan to run a can down the road.
Yes, this barrel is designed for standard AR-15 upper receivers. It uses the same bolt face as 6.5 Grendel, so you'll need a 6mm ARC bolt or BCG for proper headspacing, but the barrel itself fits any mil-spec AR-15 upper.
| UPC | 810046230541 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 60D100C |
| Length | 16.10" |
| Model |
You must be logged in to post a review.
Reviews
There are no reviews yet.