MPN: K358


  • Designed for minimal weight, minimal added length and maximum performance
  • Minimize muzzle rise and recoil
  • Made with USA sourced hardened steel for durability
  • Comes with a thread adapter
  • No linear baffles
  • Eight gas ports to mitigate muzzle rise (No timing is necessary)
  • Full-Auto rated
  • Designed and made in the U.S.A.


  • Caliber: 9MM
  • Material: Hardened alloy steel
  • Finish: Mil-spec black finish
  • Weight: 2.68 oz.
  • Length (with thread adapter): 2.105"
  • Outer Diameter: 0.938"
  • Thread: 1/2"-28 TPI


  • 9mm carbine barrel with 1/2"-28 thread pitch


Some purists turn up their noses when the 9mm comes up in competition. The truth is that the 9mm has earned its stripes as a PDW as well as at the range. So, if you’re one of the rebels that run this round, good for you. You should get your hands around that 9mm and have a ball with it. Just take that extra step to get the most fun you can from this little cartridge. That step is adding a 9mm muzzle brake.

One Device, No Waiting

The Rex Silentium compact tactical 9mm muzzle brake packs a lot of punch into a small package. Whether your game is three-gun competition, CQB, or you just want a PDW. The rules allow a muzzle brake. This little rascal comes in at less than three ounces. You won't even notice that it's there until you shoot. The Rex Silentium presents less than one inch for its outer dimension. This small size means you can tuck it inside any rail that you want. However, it's so stunning you're going to want to let at least a little of it show.

Ready To Rock And Roll

Is there any chance that your future may have a full-auto in it? If there’s the slightest chance, then you want a 9mm muzzle brake that can handle the job. The compact Rex Silentium is made from solid, hardened steel and comes full-auto rated. If your goal is to mitigate muzzle rise and recoil, you want something like this brake in your arsenal. You can forget about those temporary paperweights on the market. The Rex carries an absolute lifetime guarantee against defects in material or workmanship. Get Rex and be ready for anything that comes your way.

Have a question?

Ask an Expert

Reviews (3)

  • Rex Silentium K-Type Compact Tactical AR 9mm Muzzle Brake

    Posted by Sean D on 30th Jan 2023

    I installed this beauty on my Just Right 9mm Carbine Take Down model and it gives the gun a cooler look. Not only does it look amazing on the gun but performance as well. Minimal recoil, the 8 gas ports really does the trick. Yes, your friends will ask you where you got it from also.

  • Super little muzzlebreak!

    Posted by Dusty Arrow on 5th Jun 2020

    Running this on my 10.5" barrel and it really does the job! Looks great with the stainless barrel it is paired with.

  • Rex Silentium K type muzzle brake 9mm

    Posted by william on 26th Apr 2020

    Applied this to my Kel Tec Sub 2000 gen 2. Delivery was timely and the hermetically sealed and labeled packing rather unique. Was expecting some reduction in felt recoil but hoped for substantial reduction in muzzle lift/rise. Pleasantly surprised on both ends as the barrel stays almost flat between rapid shots and felt recoil (without a pad) was akin to a .22 mag.13 33 rd mags later the shoot was painless. In the works are 50 round drums and a GatCrank and the full auto rating will be tested. Ultimately pleased with my purchase and the mean curves and slotting give aesthetic icing on the cake.

Customers Also Viewed