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JMAC 360 KeyMount HD Muzzle Brake

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JMAC 360 KeyMount HD Muzzle Brake -multi

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The RRD-360HD is designed specifically with short barrels and high pressures in mind! Due to excess pressures/gasses associated with rifle calibers in short-barreled firearms, a barrel length restriction was put in place for many of JMAC’s popular devices. To remedy this, they’ve taken their 360 design and reinforced the device by adding additional material where it's needed and removing material in some areas to cut down on size, and weight. You get the same amazing performance out of the 360 devices, now with a Heavier Duty design for short-barreled firearms!

Technical Specifications:

Keymo and Keymicro Compatible

Material: 17-4 Stainless Steel

Finish: Black Nitride

Specifications

More Information
Dimensions	7x9x1

Product Questions (15)

Customer Questions

What is a muzzle brake and how does it reduce recoil?

A muzzle brake is a device attached to the muzzle of a firearm that redirects gas to counteract recoil. By venting gas sideways or upward, it reduces the backward force and muzzle rise, making it easier to maintain accuracy and control during rapid fire.

Is "muzzle break" the same as "muzzle brake"?

No, "muzzle break" is a common misspelling. The correct term is "muzzle brake," referring to a device that helps reduce recoil.

What is the best muzzle brake for a 6.5 Creedmoor rifle?

Top choices for a 6.5 Creedmoor muzzle brake include the Dead Air Keymo Brake, SilencerCo ASR, and CAT Spooky. These brakes are highly effective at reducing recoil and provide a secure mounting system for silencers.

How do I choose the best muzzle brake for my .308 rifle?

There are tons of great 30 Caliber brakes, look into devices like the Dead Air Keymo Brake, SilencerCo ASR, Q Cherry Bomb, and Dead Air Xeno Brake.

What are the benefits of using a muzzle brake on an AR-15?

A muzzle brake on an AR-15 reduces recoil and muzzle rise, allowing for quicker follow-up shots and improved accuracy. Muzzle brakes can also serve as a secure mounting solution to attach a suppressor for an AR15.

How do I install a muzzle brake on my AR-15?

Installing a muzzle device is simple and can be done with basic tools. Refer to our video to see how to correctly install a muzzle device: https://www.youtube.com/watch?v=6NF-WVnHDz0

What muzzle devices are available for AK rifles?

Many companies make AK-specific muzle devices, featuring common AK thread pitches. Rugged, Dead Air, SureFire, SilencerCo, JMAC Customs, and others have excellent AK muzzle brakes.

Are longer muzzle brakes more effective than shorter ones?

Yes, generally a larger brake will redirect more gas, allowing for more recoil reduction.

Can I use a muzzle device on a 9mm firearm?

Yes, muzzle devices are available for 9mm firearms, typically compensators or flash hiders. These devices help control muzzle rise or reduce flash, enhancing accuracy and visibility during rapid fire. They can also work to attach suppressors.

What is a 1/2x28 muzzle brake and which firearms is it compatible with?

A 1/2x28 muzzle brake has threads sized for barrels with a 1/2x28 pitch, commonly found on AR-15s in 5.56/.223 and many 9mm firearms. Ensure compatibility with your barrel thread pitch before installation.

Do I need a muzzle brake for my 5.56 rifle?

A muzzle brake can enhance control and reduce recoil on a 5.56 rifle, especially for competitive or rapid shooting. Muzzle brakes may also allow you to add a suppressor to your firearm, to reduce recoil and sound while shooting.

Are muzzle brakes effective on shotguns?

Yes, muzzle brakes on shotguns can reduce felt recoil, making shooting more comfortable, particularly with heavy loads. They’re often used for hunting and sport shooting to improve control.

What is a suppressor muzzle brake combo and how does it work?

A suppressor muzzle brake combo combines a muzzle brake with a suppressor mount, allowing for recoil reduction when the suppressor is not attached. When the suppressor is mounted, it further reduces noise and flash.

What's the difference between a muzzle brake and a compensator on an AR-15?

A muzzle brake reduces recoil by redirecting gases sideways, while a compensator redirects gases upward to reduce muzzle rise. Muzzle brakes help with recoil control, and compensators aid in maintaining muzzle alignment for faster follow-up shots.

Can I use a suppressor with a muzzle brake on my firearm?

Yes, many suppressors can attach over a compatible muzzle brake. This setup can reduce recoil and improve sound suppression when the suppressor is mounted, combining the benefits of both devices.

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