Defcon 1 CUSTOM 12 GAUGE Shotgun Clamp-On Muzzle Brake With Front Sight Clearance .



INSTALLATION GUIDE for the Defcon 1 CUSTOM 12 Gauge Shotgun Clamp-On Muzzle Brake With Front Sight Clearance

GGW Defcon 1 CUSTOM 12 Gauge Shotgun Clamp-On Muzzle Brake reduces recoil by a minimum of 60%, eliminates muzzle rise, dust signature and shotgun torque. The Defcon 1 is made of the highest quality materials and workmanship to deliver high performance and recoil reduction, keeping you on target, while increasing accuracy. Available in 416 Stainless Steel and 7075 Aircraft Aluminum; coated with durable and impact resistant Cerakote paint. Grizzly Gunworks Clamp-On Shotgun Muzzle Brakes are made custom for your 12 Gauge Shotgun with a front sight; according to your specifications, therefore, producing a uniquely designed Muzzle Brake to perfectly fit your firearm. Grizzly Gunworks Clamp-On Shotgun Muzzle Brakes are customizable offering a minimum of seventeen colors and finishes, as well as, colored high strength machine bolts. Quickly and easily install your Clamp-On Shotgun Muzzle Brake with zero gunsmithing. You are purchasing a Clamp-On Shotgun Muzzle Brake that is made for a non-threaded shotgun barrel. Grizzly Gunworks offers Muzzle Brakes for threaded and non-threaded barrels. This product is made for a 12 Gauge Shotgun barrel that is not threaded and has a front sight.

MAGAZINE TUBE CLEARANCE: Clamp-On Muzzle Brakes must slide onto the barrel a minimum of one inch for secure clamping. Clearance can be made for an extended mag tube that reaches the end of the barrel, but not past the muzzle tip. The minimum gap between the bottom of the barrel and the top of the magazine tube cannot be thinner than 0.100". A magazine bracket cannot be within the last one inch of the barrel.

BOLTS: Four bolts are INCLUDED with every Clamp-On Muzzle Brake. Different colored bolts can be ordered to diversify the look of your Defcon 1 CUSTOM 12 Gauge Clamp-On Shotgun Muzzle Brake. Additional bolts are $15.00 U.S. per four bolts with a Clamp-On Muzzle Brake purchase.

Colors: Standard three colors and finishes are available at NO extra charge:

  • Armor Black
  • Flat Dark Earth
  • Bead Blast Dull Finish

All other custom colors and bead blast polished finish are an additional coating charge of $35.00 U.S.

Bolts: Four high strength machine BLACK or STAINLESS STEEL bolts are included. Polished and Bead Blast finishes come with Stainless Steel bolts. All other muzzle brake colors come with black bolts.

Additional bolts can be purchased in different colors for $15.00 U.S. per Four Bolts with a muzzle brake purchase.


  • Approximate Dimensions:

    Length : 3.0"
    Width: 1.6"
    Thickness: 1.2"
  • Material and Weight:

    416 Stainless Steel: 9.0 oz
    7075 Aircraft Aluminum: 3.0 oz
  • Recoil Reduction:

    Minimum 60%
  • Gauge:

  • High Strength Machine Bolts:

    Four BLACK or STAINLESS bolts are INCLUDED with every CUSTOM 12 Gauge Shotgun Clamp-On Muzzle Brake purchase. Bolts are available in a wide range of colors.

    Grizzly Gunworks Defcon 1 CUSTOM Shotgun Muzzle Brakes are made for all shotguns with a front sight - Optional magazine tube clearance available.