Tel. (226) 208-1200

Displayed below are many examples of our previous work on Defcon 1 AR Muzzle Brakes, for threaded and non-threaded barrels.  

Click on the images to enlarge them. 

Defcon 1 THREAD ON Muzzle Brakes for the AR

The DEFCON 1 Muzzle Brake for ARs is manufactured specifically to tight tolerances and high quality to ensure your recoil, dust signature, muzzle rise and rifle torque are virtually ELIMINATED.  There are 3 parts along each side angled back at 15 degrees to grab the gases and pull the AR recoil off your shoulder.  The DEFCON 1, also, reduces target acquisition time, vertical dispersion and maintains your AR’s accuracy.  Our muzzle brakes are custom made to specifically fit your barrel’s specifications further enhancing your AR’s precision.  The DEFCON 1 is available in various finishes to match your weapon; choose your color, finish, material, mounting option and caliber.  The DEFCON 1 is, also, available for threaded and non-threaded barrels.  Grizzly Gunworks offers an advanced design for non-threaded barrels, called the CLAMP-ON Muzzle Brake.  The above saves you time, money and leaves the barrel in its original condition as it is not required to have your barrel threaded by a gunsmith.  The installation of our muzzle brakes is precise, fast and simple.  The above options allow you to choose the perfect muzzle brake for your AR with superior quality and unmatched performance.  

Product Specifications:

  • Custom made for any threaded or non-threaded AR.
  • 6 port design.
  • Available in the Clamp-On Design that fits any barrel without thread.
  • Available in the Thread-On Design that fits threaded barrels.  If your barrel is not threaded and you would like to purchase a Thread-On Muzzle Brake your rifle will need to be threaded by a gunsmith. 
  • Four bolt Clamp-On design for Non-Threaded ARs.
  • No bolt Thread-On design for Threaded ARs.
  • Coated in KG Ceramic Gun Kote for a hard, durable and long lasting finish.
  • Recoil is virtually ELIMINATED.
  • Tested on many ARs including:  Colt AR 15, Bushmaster AR 15, Sig Sauer AR, to name a few.


Height:  1'
Width:  1.45" 
Thread On Length:  2.55"
Clamp On Length:  3.00" 
Weight: - Steel - Approx. 0.4 lbs 
              - 416 Stainless Steel -  Approx. 0.4 lbs
              - 7075 Aircraft Aluminum - Approx. 0.2 lbs 

Customizable Options:

Color:  Flat Black, Flat Dark Earth, Flat OD Green, Flat Desert Tan, Dull Bead Blasted, Shiny, Dull Bead Blasted with Black Ports, Shiny with Black Ports.
Finish:  Dull Bead Blasted, Shiny, KG Ceramic Gun Kote.
Material:  Steel, 416 Stainless Steel, 7075 Aircraft Aluminum
Mount Option:  - Threaded
                        -  Clamp-On - fits any barrel without threading

Defcon 1 Muzzle Brake Colors/ Finishes:

Click on the pictures below to see a more detailed view of the Defcon 1 Muzzle Brake color/ finish ideal for your Assault Rifle 

Defcon 1 Muzzle Brake Demo


Defcon 1 CLAMP ON Muzzle Brakes for the AR