JMac - MDi-co

2C 1/2-28 X12 - Alpha

(5 Reviews)
$109.95 $87.96
You save $21.99
Current Stock:
2.50 Ounces
Shim Kit
Add a Blast Shield
Pin for Pin/Weld

(R)ecoil (R)eduction (D)evice (2) ports (C)ompensator (28)1/2x28 (S)houlderMount (X12)1.125-28 External Threads

The X12 Series Muzzle Brakes combine our effective RRD muzzle brake design and a direct thread mount for several popular suppressors as well as our BDS-12 blast shield! This allows you to leave the muzzle device installed and simply thread the suppressor over! Reduces weight, length, and cost compared to QD systems. Direct thread is also the preferred mounting method for accuracy!

Product Specs:

  • 1/2-28 Threads
  • X12 - 1.125-28 External Threads
  • 10mm Bore
  • 17-4ph Stainless Steel
  • Black Nitride
  • Requires timing for proper function.
  • *Not intended or recommend 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.

X-Series Device 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.


Reviews (5)

RRD-2C 28S 12

Written by Jamie W Raby on Jun 18th 2021

Perfect fit and finish. Now it’s time to suppress my KP9. Y’all make good stuff ! Thanks guys

Nice looking

Written by Kyle on May 3rd 2021

I just got this and I live the look of it . I hope to shoot out of it soon and suppress it one day .

RRD-2c 28s x12

Written by Mike on Oct 9th 2020

This is outstanding product. The machining is top notch

Buy it

Written by Mike on Jun 22nd 2020

Works great to attach my obsidian to my b&t! Very nicely machined and finished. It looks very nice as well, too bad it’ll hardly ever see daylight as i plan on keeping my rugged attached to it!


Written by Dakota Meis on May 26th 2020

Fantastic looking break, keeps what little recoil my 9mm has down, and I can thread my suppressor onto it. What isn’t to love?

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