JMAC 4 Port Recoil Reduction Devices

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The RRD-4C is a lightweight Muzzle Brake Compensator that not only reduces recoil by 20% and virtually eliminates muzzle rise but also REDUCES FLASH*! This one of a kind combination device gives you control over your firearm like you've never had before.


  • 17-4ph Stainless
  • Black Nitride


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

  • RDD-4C-14-S: (4)ports (C)ompensator (14)mmLH threads (Slim) Slim design
  • RDD-4C-30S-KM: (4)ports(C)ompensator(30)5/8x24(S)houlder(KM)KeyMount 

Keymount Suppressor Compatibility

Warning: Not intended or recommend for barrels shorter than 10.5” When testing these devices, we found that high rates of fire such as full auto or “mag dumps” could cause damage to the device due to the excess heat, pressure, and gasses from unburnt powder on shorter barrels.

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.