Jeff@GrizzlyGunworks.com

Tel. (226) 208-1200


THREAD ON INSTALL GUIDE

SAFETY RULES:


  • Make sure your firearm is not loaded.
  • Always have the muzzle pointed in a safe direction. 
  • Do not place your finger on the trigger or on the trigger guard.
  • Prove your firearm is safe.  Remove the bolt and/ or magazine.
  • Always be aware of your target and surrounding area. 


WARNING:


  • GRIZZLY GUNWORKS assumes no responsibility for any injury or property damage resulting from improper or careless handling, intentional or accidental discharge of the firearm.
  • GRIZZLY GUNWORKS assumes no responsibility for any damage or injury whatsoever occurring in connection with, or as the result of faulty, non-standard, remanufactured, hand-loaded ammunition or cartridges other than those for which the firearm was originally chambered.
  • Make sure that the ammunition being used matches the caliber that is marked on the side of the barrel and/ or action, as well as, the caliber that is stamped on the bottom of your muzzle brake. 


How to install a Grizzly Gunworks Thread On Muzzle Brake?


  1. Follow the SAFETY RULES at all times.
  2. Make sure the firearm is unloaded.
  3. Remove the bolt and magazine from the firearm.
  4. Align the muzzle brake with the barrel, and thread it on as far as possible.
  5. When the muzzle brake stops turning, back it off counter clock wise to level or time the muzzle brake.
  6. Position the caliber stamping and GGW at the bottom. The bolt heads should be facing upwards.
  7. Blue Loctite or removable thread locker can be used, however, it is not necessary on thread on muzzle brakes.
  8. Tighten the two fastening bolts to 80 inch pounds.  ** Note: Tighten the bolts gradually, back and forth, and work your way up to 80 inch pounds. Please DO NOT tighten one bolt to 80 and then the other to 80, you have to alternate the bolt adjustment while tightening. ** 


Before test firing do the following:


  1. Follow the SAFETY RULES at all times.
  2. Make sure the firearm is unloaded.
  3. Since your bolt is removed, look through the barrel to make sure it is free from obstruction.
  4. Make sure the muzzle brake bolts are tightened to 80 inch pounds.
  5. Make sure the ammunition you are using, the caliber stamped on your firearm and the stamping on the bottom of your muzzle brake are all matching.
  6. Always wear ear and eye protection during firing.


How to remove a Grizzly Gunworks Thread On Muzzle Brake from your firearm?


  1. Follow the SAFETY RULES at all times. 
  2. Make sure the firearm is unloaded.
  3. Remove the bolt and magazine from the firearm.
  4. Loosen the fastening bolts.
  5. Unthread the muzzle brake until removed.  

This guide is for Thread On Muzzle Brakes that have internal threading for your threaded muzzle.  
Please read the following guide before attempting to install or use your muzzle brake.


Below are examples of Threaded Muzzle Brakes.  Please note Grizzly Gunworks makes Thread On Muzzle Brakes for many muzzle brake designs; however, all threaded muzzle brake styles install the same. ** Exception **  Some AR Thread On Muzzle Brakes come without bolts.  If your AR Thread On Muzzle Brake does not have bolts please visit our AR Thread On Muzzle Brake (Without Bolts) Installation Guide.  If your AR Thread On Muzzle Brake has bolts please proceed with this guide.