Non-Firearm warranty:
Cobalt will warranty any receiver/chassis set, accessory, or non-firearm part against manufacturing defects for up to 1 year from its original purchase date. The part must not have been improperly modified by the customer or they will not be eligible for a replacement. This warranty is only valid for the original owner of the purchased part and cannot be transferred to another owner. You may still be eligible for a discounted replacement to any part that is out of warranty or has been improperly modified by the consumer if they reach out to our Customer Service team.

(Please contact warranty@cobaltkinetics.com with any questions.)

If you need to correct information regarding your order (FFL, Addresses etc) we can help assist that correction as long as the product ordered has not shipped. However, if you place an order for a rifle or a suppressor and it has already been formed/put into production we are not able to make changes due to NFA paperwork/rifles being built to order.

Will I receive tracking?

Yes, it will be sent to the email address on file.

For firearms: We do not accept cancellations on orders for Rifles/ Pistols, they are built to order and we cannot stop them once they are in the production phase. Because of that, we ask that you make sure that you have asked any questions needed to help confirm what you are ordering.

For accessories: (Excluding: Silencers/ Class 3 items) If you cancel, we will refund you prior to shipping. However, you will be charged for the credit card processing fees and restocking fee

Any serialized item will have to go to an FFL (or an SOT, for Class 3 items) to complete the necessary BATFE paperwork required for lawful transfer of ownership. Once you choose the item you want, fill out the billing and shipping information. You will need to choose a FFL/SOT near you, and input that information in the order notes (or email us with that information).

• For general products: If a product is in-stock it will be shipped to you as soon as payment processing/ fulfillment has taken place. 
• For Rifle/ Pistol platforms: Currently our lead times for Rifle/ Pistol orders are 2-4 weeks. We will then make sure that you have provided the correct info of your preferred Dealer, for the FFL transfer/ shipping phase of this transaction.
• Receiver sets/ URG’s: Currently our lead times are 2-3 weeks. We will then make sure that you have provided the correct info of your preferred Dealer, for the FFL transfer/ shipping phase of this transaction. URG’s are exempt from the FFL requirement.
• For NFA items: After payment has been successfully processed, we then make contact with your Class 3 dealer of record and move on to the BATFE compliance phase of the transaction. We recommend that you work with your dealer to ensure that this process is seamless. 
• For combined orders: If you purchase a Rifle/ Pistol that requires a lead time and other products that are in stock, they will all ship to you when the entire order is finalized. We will then make sure that you have provided the correct info of your preferred Dealer, for the transfer/ shipping phase of this transaction.

• Rifle weights:
• 7.5”: 5.5lbs
• 10.5”: 5.9lbs
• 11.5”: 6lbs
• 12.5”: 6.2lbs
• 13.7/9”: 6.4lbs
• 14.5”: 6.4lbs
• 16”: 6.6lbs

Color options (currently) are: Black, Charcoal, Cobalt Kinetics Green and Flat Dark Earth.

Yes, indeed they do! Our uppers will work with lower receivers designed to MILSPEC TDP. We recommend using a lower from a reputable company that maintains a high tolerance for QC.  

They are 7075/ T6 billet aluminum, this allows us to dial in the design features that make our platforms perform better. It allows us to hold tighter tolerances where it counts.

At this time there is not an Ambi option for the receiver sets.

No, they are not proprietary. The only two parts that HAVE to be used together are the; 1.) CK Upper (stripped), and the 2.) CK S.I.M.S. System Handguard. These are the two most important features that we focused on to alleviate issues that we see present in other manufacturers’ platforms. We wanted to offer solutions, without passing the burden off to the consumer.

• S.I.M.S. System handguard interface: The Self-Indexing, Monolithic/ Semi System was designed to solve issues that are still present on many AR platforms (and parts) made by other manufacturers. This update was focused on addressing two primary points; 1.) the Handguard/ Upper interface, and 2.) isolating the key components in the upper receiver to allow them to function at peak mechanical performance.    
• Enhanced barrel extension lock-up & rigidity: Our approach to this solution was to start with using a billet aluminum blank (for the upper) and incorporating an elongated extension (where the barrel is installed) so the threaded area is now internal and has a higher thread count (with finer threads). The addition of finer threads & higher thread count give the jam nut (which was also elongated) more surface area for stronger engagement when the final torque is applied. The torque is now distributed over a wider plane and switching to a lighter & matching alloy (7075 T6 aluminum) prevents the materials from competing when heat is applied during a heavy firing cycle. The end result has also been shown to create a stronger relationship between the upper/ barrel and is closer to a barreled action (like a bolt action platform) than a traditional AR “copy/ paste” design. Enhancements in overall accuracy are a beautiful by-product of this and have been exhibited across all of our models.
• A monolithic approach, with no strings attached: Monolithic upper receivers are a great concept and will allow end-users to “cross mount” optics from the upper to the handguard, but then come with a list of detractors that now passes the burden off to that same person. Most of the widely known options will; 1.) require special tools to change a barrel out (you can use our jam nut tool or a closed end crows foot wrench), 2.) require barrels with proprietary extensions (rendering the entire aftermarket of available AR barrel options useless), 3.) prevent you from getting under the handguard for simple maintenance. We decided to address these issues by designing an interface that locks directly to the upper receiver (at 4 points via 8 screws) and is easy to take off. It offers the benefits of both worlds, without the detractors of the latter. The only proprietary NEED is that you have to use our Upper/ Handguard together, but that is by design. 
• Non-rotating lock-up: Most handguards that mount (directly) onto MilSpec/ Forged uppers use the barrel nut as the main means of retention (via various methods of cross-bolt type designs). This method of retention can compromise the barrel torque if the handguard is to ever be placed under considerable torsion, or shearing stress, during use in austere conditions (I.E. a Duty platform being employed in an emergency situation) rendering it in-operable/ safe to fire. Our solution separates the “Lock from the Key” and gives each area its own means of lock-up, without interfering with the other. The Jam nut stays firmly torqued to spec and shielded by the Handguard. Alternatively, the Handguard completely overlaps the Jam nut and bolts down directly to the upper receiver. These scientifically backed examples exist in all types of manufacturing, yet fewer AR manufacturers choose to apply it. 
• Ease of alignment during installation: The upper receiver features a “keyed index” tab that is a reference point for perfect alignment of the handguard. This gives the end user a simple & repeatable method to ensure that the handguard is seamlessly aligned, before the screws are torqued/ set. Another benefit that has been documented is 0% loss of MOA on secondary optics and VIS/ IR laser aiming units when the handguard is installed/ uninstalled for standard maintenance purposes.

• 6.75” (Typically used for 7.5” + barrels)
• 9.8” (Typically used for 10.5” + barrels)
• 10.8” (Typically used for 11.5”+ barrels)
• 11.8” (Typically used for 12.5”+ barrels)
• 13” (Typically used for 13.7/14.5”+ barrels)
• 15.5” (Typically used for 16”+ barrels)

• List of Cobalt parts provided with set:
• Jam nut: For installation of your barrel, any barrel designed to MilSpec TDP will work with our upper receiver. (Refer to Jam nut torque FAQ for ft/ lbs rating)
• Handguard screws: To lock your S.I.M.S. handguard onto our upper receiver, a total of 8 screws will be provided. (Refer to Handguard screws FAQ for in/ lbs rating) 
• Ejection port cover rod screw: For retaining the ejection port covers’ rod in place, cleverly positioned under our S.I.M.S. System handguard. This means no need for C clips, and easier disassembly when replacing the port door. 
• Forward assist screw: This screw will hold the forward assist assy. in place and make installation a breeze. No need for pin punches/ hammers, which may damage (or mar) the receiver.
• Bolt catch/ release screw: This screw will hold the bolt catch/ release in place, and make installation a breeze. No need for pin punches/ hammers, which may  damage (or mar) the receiver. 

Yes, you need to use our specific jam nut tool to loosen/tighten the jam nut. The use of any other tools resulting in damage to the jam nut itself or any other parts of the rifle will not be covered under warranty and you will have to pay for any repairs. 

• Buffer weight recommendations: 
• 7.5” (5.56): A5H4
• 7.5” (300 blk): A5H2
• 10.5”-12.5” (5.56): A5H3
• 13.7”-16” (5.56): A5H2 
• 18”-22” (5.56): A5H2
• 14.5” (6arc): A5H3 
• 16” (6arc): A5H3
• 18”-22” (6arc): A5H3
• All platforms were running a Standard Weight, A5 length, Rifle spring at time of testing.
• FYI: Remember, some barrel manufacturers may over gas their barrels for “Combat Reliability”, so this may be something that you would need to consider when sourcing parts on your own for your next build…

• Here is our muzzle device mounting info, so you can match it to your preferred suppressor:
• RCB-KM:  (1/2×28 & 5/8×24) works with Deadair Keymo mounting solutions.
• RCB-HX:  (1/2×28)works with Huxwrx QD mounting solutions. 
• RCB-SC: (1/2×28) works with Silencerco ASR mounting solutions. 
• RCB-6: (1/2×28 & 5/8×24) works with our CK-Scrambler (QD) suppressor, CGS SCI-Six, and any 1.375×24 suppressor (when paired with the hub adapter from CGS Group). 

As of right now, you can choose between our Titanium or Inconel-718 versions. 

Call us or email us at sales@cobaltkinetics.com