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The CMMG 66AFC70 steps up where other magazines fall short with 6.5 Grendel cartridges. This is a 10-round magazine engineered specifically for proper feeding of both 6.5 Grendel and 6mm ARC ammunition in a standard AR-15 magazine well, though 22 ARC is also compatible.
The body is constructed from stainless steel and finished in black, giving you corrosion resistance without the weight penalty of heavier steel alternatives. This matters if you're running the mag in demanding conditions where moisture or salt exposure becomes a factor. The anti-tilt blue polymer follower keeps rounds aligned as they feed, and the high-tensile steel spring ensures consistent upward pressure even after heavy use. Precision-machined feed lips and consistent internal geometry create a wobble-free fit in any Mil-Spec AR-15 lower receiver.
Unlike standard 5.56 magazines, a proper 6.5 Grendel magazine needs to account for the larger diameter of the cartridge. This CMMG design handles that geometry correctly so rounds feed smoothly without binding or stalling. The 10-round capacity works for hunters, precision shooters, and anyone who wants a compact mag that still delivers performance. The blue follower is easy to spot, so you know at a glance whether the magazine needs reloading.
If you're running a stock AR-15 lower with standard Mil-Spec dimensions, this magazine drops right in. It's compatible with any upper receiver chambered in 6.5 Grendel, 6mm ARC, or 22 ARC, making it a solid choice for dedicated builds or conversion uppers.
No, this magazine is specifically designed for 6.5 Grendel, 6mm ARC, and 22 ARC cartridges. The feed lips and internal geometry are sized for the larger diameter of Grendel rounds. Using standard 5.56 magazines with 6.5 Grendel can cause feeding problems, so a dedicated Grendel magazine like this one is important for reliable function.
The blue anti-tilt follower on this CMMG magazine is specifically designed to work with 6.5 Grendel cartridges and their larger diameter. Not all followers are created equal for different cartridge sizes, so using a magazine built for your caliber with the right follower design matters for feeding reliability. The blue color also makes it easy to see when the magazine is empty at a glance.
Yes, the CMMG 66AFC70 fits any Mil-Spec AR-15 lower receiver without modification. It uses a standard AR-pattern design that drops right into any stock AR-15 magwell. Just make sure your upper receiver is chambered in 6.5 Grendel, 6mm ARC, or 22 ARC to use it properly.
Stainless steel resists corrosion better than standard steel, so it holds up well in harsh conditions without rusting. The black finish adds a layer of protection and keeps the magazine light compared to heavier steel options. Combined with the high-tensile spring and quality feed lips, it gives you a durable magazine that feeds reliably without constant maintenance.
| UPC | 815835019543 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 66AFC70 |
| Caliber/Gauge | 6.5mm Grendel |
| Capacity | 10 |
| Color | Black |
| Model | |
| Product Type | Magazine |
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