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KEYMO MUZZLE BRAKE Reviews & Ratings

The KeyMo Muzzle Brake is your gateway to silence. When you’re ready for peace and quiet use the KeyMo brake to quickly attach your Sandman Series or KeyMo equipped suppressor to your rifle. If you’re not quite ready to turn up the silence, you can still employ the finest brake on the market and experience a flatter shooting rifle with minimal concussion compared to traditional muzzle brakes.

Dead Air’s sealed taper design is forward of the Keymo locking channels, allowing the suppressor to be easily removed without carbon-locking onto the mount.

NOTE: The DA101 and DA102 come with a pre-drilled hole for pin & weld at the 6 O’clock position. The DA103, DA104, and DA106 do not have a pin/weld hole and do not have the three port holes on the top wrench flat.

Finish

Black Nitride

Material

4140 HT Alloy Steel

Threads

1/2-28, 5/8-24, 3/4-24, M18-1, M18-1.5 AI

Weight

DA101 : 4.42 oz.

DA102 : 3.90 oz.

DA103 : 4.10 oz.

DA104 : 4.10 oz.

DA106 : 4.10 oz.

Overall Length

2.82″

Bore Diameters

1/2-28: .30 caliber

5/8-24: .30 caliber

3/4-24: .338 caliber

M18-1: .338 caliber

M18-1.5: .338 caliber

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3 Stars

2 Stars

1 Stars

Reviews Summary

Customers express high satisfaction with the KEYMO Muzzle Brake, praising its design, functionality, and compatibility with suppressors. Many appreciate how effectively it reduces recoil and controls muzzle climb. A few mention the desire for additional installation accessories, but this is a minor point against overwhelmingly positive feedback.

What Reviewers Are Saying

Product Performance

86%

Reviewers consistently highlight the performance of the KEYMO Muzzle Brake, noting its effective recoil reduction and controlled muzzle rise, making it a popular choice among various rifle users.

Build Quality

71%

Many customers commend the robust construction and design of the muzzle brake. They appreciate that it looks aesthetically pleasing and functions reliably, enhancing their overall shooting experience.

Compatibility and Installation

43%

Numerous reviews mention the compatibility of the brake with different suppressors and rifles. While installation is generally easy, a few customers expressed the wish for additional accessories like washer shims to simplify the process.

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Muzzle brake + Suppression best of both worlds

This is my 3rd Dead Air muzzle brake which is perfect for quick on off suppression. Dead air key mo system is one of the best.

Would you recommend this? Yes, I would recommend to a friend

by BRANDON W. on August 08, 2026

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Wonderful machinery

Very satisfied with my purchase.

Would you recommend this? Yes, I would recommend to a friend

by MALONE C. on April 06, 2026

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Great brake

I am new to the suppressor world, but have a few guns that came with this brake installed. I have since changed the muzzle devices on all of my 5.56's to this brake. It works great alone or it allows the cans to fit on any rifle. Looks great too.

Would you recommend this? Yes, I would recommend to a friend

by JOHN S. on February 23, 2025

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Good muzzle brake and silencer adapter

Fits the Sandman silencer perfectly. Also works as a muzzle brake without the silencer.

by ROBERT M. on February 23, 2024

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Awesome Keymount muzzle brake

This is my favorite Keymount accessory made by Dead Air. It is extremely well made and robust. It looks great and doesn't give the appearance that something is missing like most adapters do. The lock-up when installing the suppressor is fast and precise. I really like the flash hider as well, but the muzzle brake seems more functional and useful. I even like it on light weight AR 15's as the reduce recoil somewhat and help control muzzle climb. For the price it would be nice if Dead Air included some washer shims for install.

Great product

After trying this unit on a 300 Blackout, I have taken to adding these, plus the 1/2 x 28 version on all of my rifles. The included shims make it very easy to time the compensator correctly. A very well thought out product.

Great brake

This is my fourth Deadair muzzle brake, I have one on a .243, one on a 6.8 and one on a 5.56--this one will go on a .300 Blackout. They function superbly and don't corrode, I just flush them with Rem Oil, wipe them off, and they are ready for next time. I use them both with and without my Sandman-S suppressor. Super design on retaining the suppressor, never ever any looseness and comes right off when I want it to. I do have them installed by my gunsmith--a little pain and expense, but my choice.