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The Cobalt Kinetics CK-Pro Receiver Set is the foundation for folks who want to build the very best AR they can put together, not just another parts-bin project. This is the 10.8 inch handguard configuration wearing a clean Flat Dark Earth Cerakote finish, and it brings Cobalt's signature engineering to a matched upper, lower, and free-float rail that fit together the way a premium build should.
The heart of this set is the proprietary receiver extension on the upper. Instead of a standard externally threaded barrel nut, Cobalt uses a reverse-threaded system that seats the barrel evenly and gives you more thread engagement. That tighter tolerance on the barrel extension seating surface lets your barrel deliver more of its accuracy potential, the kind that gets lost on mil-spec receivers with high spots. The free-floated handguard then anchors to the extended portion of the upper with a 4-point, 8-screw TORX mounting system, giving you a true non-rotating setup that holds a laser zero.
Both the upper and lower are machined from 7075 T6 aluminum, and the handguard is cut from 6061 aluminum with M-LOK slots for mounting lights, lasers, bipods, and hand stops. You get the benefits of a monolithic-style upper without the usual headaches, since the barrel and handguard still come apart when you need them to. Builders who have run these sets consistently point to immaculate machining, a rigid rail, and upper/lower halves that feel hand-fitted.
This is a receiver set, not a complete rifle, so you'll be supplying your own barrel, bolt carrier group, trigger, and small parts to finish the build. It ships multi-caliber ready, so you can spec it around whatever cartridge your project calls for. If you're chasing a rifle that shoots as good as it looks, this is a serious place to start.
No, this is a receiver set built to be the foundation of a custom AR build. It includes the upper, lower, handguard, ejection port and forward assist assemblies, plus the necessary screws, jam nut, and jam nut installation tool. You'll still need to add a barrel, bolt carrier group, trigger, and the rest of your small parts to finish it out.
Cobalt uses a proprietary reverse-threaded receiver extension that houses the barrel nut and seats the barrel with more thread engagement than a standard mil-spec setup. The handguard then bolts to the extended portion of the upper with a 4-point, 8-screw TORX system. That combination locks everything in place, so the rail won't rotate and your zero stays put.
It's listed as multi-caliber, so the receiver set itself isn't tied to one cartridge. Your final chambering comes down to the barrel and bolt carrier group you pair with it, which lets you spec the build around whatever you're after.
Yes, the 6061 aluminum handguard features M-LOK slots along with a Picatinny top rail. That gives you plenty of flexibility to mount lights, lasers, bipods, hand stops, and sling attachments right where you want them.
| UPC | 850060560859 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | CK-PRO-SET-108-FDE |
| Caliber/Gauge | Multi |
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