# Cobalt Kinetics CK-Pro Receiver Set 5.56 NATO Black

**Brand:** Cobalt Kinetics
**Category:** Rifles
**Caliber:** 5.56 NATO

## Specifications

- **Caliber:** 5.56 NATO
- **UPC:** 850060560767
- **SKU:** UCExsVTxv

## Description

The Cobalt Kinetics CK-Pro Receiver Set is an AR-15 pattern upper and lower receiver kit chambered for 5.56 NATO. The upper and lower are machined from 7075-T6 aluminum and finished in black, and the kit pairs with a 6061 aluminum free-float handguard. It is built as a foundation for a custom AR-15 style rifle rather than a complete gun.

### Key Specifications
- **Brand:** Cobalt Kinetics
- **Model:** CK-Pro Receiver Set
- **Caliber:** 5.56 NATO
- **Material:** 7075-T6 aluminum receivers, 6061 aluminum handguard
- **Finish:** Black

### Detailed Features
- Non-rotating upper receiver extension locks the handguard to the upper with 8 TORX screws for a rigid interface
- 6.75-inch free-float handguard has M-LOK slots for accessories
- Kit includes the upper receiver, lower receiver, handguard, ejection port assembly, forward assist assembly, jam nut, and jam nut installation tool
- Sized as a premium receiver upgrade for a durability-focused AR-15 style build

## Frequently Asked Questions

**Q: What caliber is the Cobalt Kinetics CK-Pro Receiver Set?**

A: It is chambered for 5.56 NATO.

**Q: Who makes the CK-Pro Receiver Set?**

A: It is made by Cobalt Kinetics.

**Q: What type of product is the CK-Pro Receiver Set?**

A: It is an AR-15 pattern upper and lower receiver kit, machined from 7075-T6 aluminum and finished in black, built as a foundation for a custom AR-15 style rifle rather than a complete gun.

**Q: What does the CK-Pro Receiver Set include?**

A: The kit includes the upper receiver, lower receiver, a 6061 aluminum free-float handguard, ejection port assembly, forward assist assembly, jam nut, and jam nut installation tool.

**Q: Where can I buy the Cobalt Kinetics CK-Pro Receiver Set?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Owners building on Cobalt Kinetics receiver sets like the CK-Pro tend to comment on how tight the fit is between the upper and lower, with less wobble than some mil-spec parts kits. The machining on the non-rotating handguard interface gets called out as a nice touch versus a standard barrel nut setup, though a few builders note the proprietary mounting means they are locked into Cobalt's own handguard.

Since this is a receiver set rather than a finished rifle, most feedback centers on how straightforward assembly is. Builders generally find the ejection port and forward assist assemblies drop in without much fitting, and the M-LOK handguard is described as comfortable once the rest of the build is finished.

The CK-Pro set sits at a premium price point compared to a basic stripped receiver set, and opinions split on whether the non-rotating handguard system is worth it over a standard M-LOK free-float unit. Builders who want a distinct-looking AR-15 style rifle tend to value the fit and finish enough to justify the cost, while budget-focused builders often stick with simpler receiver options.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Classicfirearms Com | $1150.88 |

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*Data from [GunsNation](https://gunsnation.com)*