Breek Arms 2BO-S Short Single Port Muzzle Brake 9mm 1/2x28 - Thread Outside 13/16x16

Manufactured by Breek Arms
SKU: BRK4050
MPN: BRK4050
Manufactured by Breek Arms
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The Breek Arms 2BO-S Short Single Port Muzzle Brake is a precision-engineered device designed to effectively reduce recoil and muzzle rise in your 9mm Pistol Caliber Carbine (PCC). Its short profile and single 90-degree port design efficiently mitigate recoil and maintain a compact appearance. It’s constructed from heat-treated 4140 steel and has a Nitride finish for durability. This muzzle brake has an outside TPI of 13/16x16 for compatibility with the Breek Arms Castle Blast Shield (not included). Each muzzle brake is proudly made in America and includes one crush washer.


  • Compatible with 9mm PCCs with 1/2x28 threaded barrels
  • Single 90-degree port design to mitigate recoil and muzzle rise
  • External 13/16x16 threads for compatibility with the Breek Arms Castle Blast Shield (sold separately)
  • Short profile helps minimize rifle’s footprint
  • Constructed from durable heat-treated 4140 steel with a nitride finish
  • Includes one crush washer for easy installation
  • Overall length: 1.64 inches
  • Weight: 2.1 ounces
  • Made in America
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BrandBreek Arms
Caliber Gauge9mm Luger
MaterialSteel - 4140 Chrome Moly
Suppressor MountNon-Mount
Thread Pattern1/2 X 28
TypeMuzzle Brake
Weight2.1 oz.
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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