Dead Air Armament KeyMo .30 Cal. Muzzle Brake Suppressor Mount - 1/2x28

Manufactured by Dead Air Armament
MPN: DA101
Manufactured by Dead Air Armament
8 Reviews

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Note: The DeadAir (DA101) muzzle device is threaded 1/2x28 and is bored for .30 cal. It will fit any rifle that is threaded 1/2x28 and fires a bullet with a diameter of .308" or smaller

The Dead Air Armament KeyMo muzzle brake is the ultimate solution for quickly and securely mounting suppressors to your rifle. The tapered design before the locking lugs ensures your suppressor won't carbon lock on to the break for easy removal no matter how many rounds you fire. Not only is the 3 chamber brake design excellent at improving the sound profile of your suppressor by acting as a baffle, it is still an excellent recoil reduction device when your suppressor is not mounted. This model is threaded 1/2x28 for 5.56 rifles and cans and features a durable Nitride finish for withstanding the higher pressures of being concealed inside a silencer. If you are looking to take your suppressor game to the next level, you need a Dead Air Armament KeyMo compatible muzzle device.


  • Threaded 1/2x28 (bored for .30 cal)
  • KeyMo compatible mount
  • Tapered design prevents carbon locking
  • Nitride finished
  • 3 Chamber break improves suppressor performance
  • Also great at reducing recoil when used as a stand alone device
  • Includes barrel shims for proper clocking and alignment
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BrandDead Air Armament
Caliber Gauge.30 Cal
Suppressor MountDeadAir KeyMo
Thread Pattern1/2 X 28
TypeMuzzle Brake
Weight4.2 oz.
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

8 reviews

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by -

I ordered this when I realized that I need it for my new can. It came quick and it was easy to install to the barrel. Solid shipment from you all.

Perfect fit

by -

This part is well designed and engineered, while being easy to install.

Outstanding company

by -

Primary arms is a great company, fast to ship always correct orders and great values. Dead Air is also an amazing company. Definitely recommend PA to all.

Dead Air Armament 5.56 Muzzle brake

by -

This is a well made brake I needed for a build I was going to do . The build is on hold for now .


by -

I have these on 2 builds.

Perfect project

by -

Perfect project and good price working with my sandman installed on FN scar16 high recommend for quiet and law recalled

Gold standard in suppressors

by -

Dead Air ,Breaks and suppressors are awesome!
Primary Arms optics are awesome also, I trust both !

Flat shooting, proper length

by -

I bought this to use on a Ballistic Advantage 13.7" barrel (P/W) in order to bring it to the necessary 16" length. Using the supplied shims to time the device, it comes to about 16.1"-16.2".
It shoots very flat and isn't obscenely concussive. I'll eventually get a can and DA seems to be a good choice.