Cobalt Kinetics RCB-KM – KEYMO MOUNT


The RCB family is Cobalt Kinetics solution to solve excessive side blast/ concussion out of large port brakes. Our approach was a simple one, to control the expanding gasses exiting the gun so that they can be used to aid in quicker follow up shots. We accomplished this by designing a port system that optimizes the available gasses without bringing about un-necessary turbulence/ concussive energy back to the shooter.

(2 customer reviews)

Earn up to 97 Points.

The result is an eloquent solution that; controls muzzle climb, helps improve split times on follow up shots, and kills excessive muzzle flash. The finest attention to detail was also paid to the material selection, coatings, and tolerances on these units to provide the best possible option for your recoil mitigation needs.

The RCB’s can also be pin/ welded to allow for a 16” OAL on barrels ranging from 13.7” and up. Check out the specs below and see why the Cobalt RCB is the solution that you have been waiting for.

The RCB-KM models are available in 1/2X28 tpi and 5/8X24 tpi. They will support any suppressor that uses a Deadair Silencers “Key mo” quick disconnect adapter.


  • Length: 2.75″
  • Weight: 1.7 oz
  • Material: 4140 Steel
  • Coating: Nitride
  • RC Hardness: 32-34 RC
  • Tread pitch: 1/2X28 tpi & 5/8X28 tpi
  • Calibers: 5.56 X 45mm (NATO) & .30 Cal
  • Does not include shims.

Additional information

Weight N/A
Dimensions N/A
Thread Pitch

1/2×28, 5/8×24

2 reviews for Cobalt Kinetics RCB-KM – KEYMO MOUNT

  1. good2bsims (verified owner)

    Excellent muzzle device to host DA cans

  2. R. Eiler Henrickson (verified owner)

    This is an excellently designed and executed muzzle device. It’s flawlessly machined and finished, serving to dampen the recoil impulse and enable suppression of a rather snappy 6.8 Rem SPC II carbine in my inventory.

    This was my first time purchasing from Ape Defense, but it won’t be my last. I just can’t argue with the lowest price around coupled with free and prompt shipping.

    5/5 all the way around.

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