Iron Curtain Customs
JMAC CUSTOMS RRD-4C-28F KEYMOUNT BRAKE 1/2x28
JMAC CUSTOMS RRD-4C-28F KEYMOUNT BRAKE 1/2x28
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(R)ecoil (R)eduction (D)evice (4)ports (C)ompensator (1/2x28) thread pitch (F)acemount (KM) KeyMount
The best of both worlds! Our super effective RRD-4C muzzle brake with KEYMO suppressor mount!
This RRD-4C is designed to be permanently attached to a 14.5 inch barrel and allows you to attach KeyMount compatible devices and suppressors! We recommend this muzzle device be professionally installed on our 14.5" barrel by one of our Kalashnismiths to ensure alignment.
- 1/2-28 threads
- 2.82" long
- Only adds 1.5"
- Sleeves the barrel 1.32"
- 17-4ph Stainless
- 3.6oz
- *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.
*This WILL NOT work on a standard 1/2-28 AR-15 barrel. Barrel must extend at least 1.32” from the gas block.
BARREL DIAMETER MUST BE <0.585"
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.
Owned and operated by gun enthusiasts.
Building guns is what we love to do, and it shows in the finished product. We are not a retail outlet selling firearms right out of the box. Just isn’t the Iron Curtain Customs way of life.
We share the same enthusiasm.
Oftentimes we look at a completed project and say ....”I want one!!” So we share the same enthusiasm as you when it comes to having a firearm you can be proud to own, love to brag on, and share with your buddies.
20 Years of Experience
After nearly two decades in the industry there are thousands of guns out there that started with humble beginnings in our shop. We will give you the best advice and let you make your own decision as to the direction of your project.
Commitment to Service
Ultimately you, the end user is what matters the most. We challenge ourselves to make firearms that in some form or another haven’t been done before. Whether it’s a small modification or a major mashup…we completely accept the challenge. All of our work comes with a lifetime warranty. We completely stand behind everything we build.
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