JMAC 360 Recoil Reduction Devices

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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.

The RDD comes in standard and Heavy Duty (HD) variants. Standard variants are not recommended for full auto fire or barrels shorter than 10.5". 

The RRD-360HD (Heavy Duty) 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 


  • 17-4ph Stainless
  • Black Nitride


The following options are available. Be sure to select the proper option when adding to cart.

  • RDD-360HD-30S-X37: (H)eavy (D)uty (S)houlerMount (X37)1.375-24 External Threads
  • RDD-360HD-28S-X37: (H)eavy (D)uty (28)1/2-28 Threads (S)ShoulerMount (X37)1.375-24 External Threads
  • RDD-360HD-30S-KM: (H)eavy (D)uty (30S)5/8-24 Threads (S)houlderMount (KM)KeyMount
  • RDD-360HD-28S-KM: (H)eavy (D)uty (28)1/2-28 Threads (S)houlderMount (KM)KeyMount
  • RDD-360HD-14F-X37: (H)eavy (D)uty (14)14-1LH Threads (F)Facemount (X37)1.375-24 External Threads
  • RDD-360-28S-KM: (28S)1/2-28 Threads (S)houlderMount (KM)KeyMount

For "Facemount" options: This device is designed to be tightened against the face of the barrel. 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!

Keymount Suppressor Compatibility

X-Series Device Compatibility 

Warning: JMac Customs & Haga Defense are 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.