JMac - MDi-co


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Current Stock:
4.20 Ounces
Facemount Shims
Pin for Pin/Weld

(R)ecoil (R)eduction (360)Degree Ports (H)eavy (D)uty (24)24-1.5RH (F)aceMount (51T)51 Tooth AAC

The RRD-360HD-24F-51T is designed specifically with short barrels and high pressures in mind! Due to excess pressures and gasses associated with rifle calibers in short-barreled firearms, a barrel length restriction was put in place for many of our popular devices. To remedy this, we've taken our 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 our 360 devices, now with a Heavier Duty design for short-barreled firearms!

The 51T version of this device is compatible with any 51T AAC patterned device or any 1.375-24 Hub device with the 51T STAMP adapter.  

The RRD-360 Muzzle Device from JMAC Customs is unlike others on the market today. This device vents gasses 360 degrees away from your muzzle requiring less effort from the shooter to manage recoil. The use of additional, smaller ports, allows the gasses to disperse in a less concentrated pattern which reduces flash and concussion when compared to a standard muzzle brake. Due to the 360 design, this device does not require timing which makes installation much more simple and does not require shims or crush washer. 

What makes the 360 unique?

  • 3 baffles to protect your suppressor
  • No timing / shims not required
  • Lightweight
  • Minimal added length
  • Compatible with dozens of suppressors
  • Reduced Recoil


  • 24-1.5RH Threads
  • Overall Length: 2.45"
  • Lenght Added: 1.83”
  • 10mm Bore
  • 51T Compatible
  • 17-4ph Stainless
  • Black Nitride

This device is designed to be tightened against the face of the barrel. If timing is required, you must use our face shims (optional) or your barrel MUST be faced to properly time this muzzle device. If you're not familiar with Facemount devices, click HERE to learn more!

***JMac Customs is NOT responsible for improper installation of this muzzle device or any damage to the suppressor using this device. We recommend this be professionally installed and checked to ensure alignment.***

JMac Customs recommends that all suppressor mounts be installed and checked for alignment by a certified professional. Serious damage could result to your suppressor/firearm and physical harm is possible if installed/used incorrectly. All suppressor mounts MUST be tight against the shoulder or face of the barrel, using shims or face-milling method. Contact us if you have any questions or need a recommendation for professional installation. JMac Customs LLC is not liable for injury, damage, or death related to the usage of this product.

This is a licensed product through Advanced Armament Company. 



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