JMac - MDi-co

360 14-1LH Face KeyMount (KeyMicro)

(2 Reviews)
Current Stock:
3.30 Ounces

(R)ecoil (R)eduction (D)evice (360) Degree Ports (14)14-1LH Threads (F)aceMount (KM)KeyMount

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. 

*Can be permanently attached to a 14.5" barrel to achieve 16" OAL.

What makes the 360 unique?

  • 3 layers of protection for your suppressor
  • No timing / shims not required
  • Lightweight
  • Minimal added length
  • Compatible with dozens of suppressors
  • Reduced Recoil


  • 14x1LH Barrel Threads
  • 2.050" long (adds approx 1.45")
  • 10mm Bore
  • KeyMount and KeyMicro Compatible
  • 17-4ph Stainless
  • Black Nitride
  • *Not intended or recommended for barrels shorter than 10.5” (see below) 

*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.

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

***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 Dead Air Silencers. 


Reviews (2)

360 14-1LH FaceMount keymicro

Written by Donnie on Feb 13th 2023

I haven't had a chance to shoot this bad boy yet, but it looks phenomenal. Everything I've bought from Jmac has been outstanding and the 360 brake looks like it'll be par for the course. Just need those FaceMount shims in stock so I can get it properly mounted! I'll be getting more jmac keymount muzzle devices in the future for sure


Written by T on Sep 12th 2022

It is nice not to have to time and does tame quite a bit of recoil on my pap m77 in .308. Machining 10/10.

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