Defcon 1 HK SL8 Rifle Clamp-On Muzzle Brake – 0.788″ Diameter Barrel – .223


INSTALLATION GUIDE for the Defcon 1 HK SL8 Rifle Clamp-On Muzzle Brake - .223 GGW Defcon 1 HK SL8 Rifle Clamp-On Muzzle Brake reduces recoil by a minimum of 90%, eliminates muzzle rise, dust signature and rifle torque. Made for non-threaded barrels measuring 0.788 inches in diameter. The Defcon 1 is made of the highest quality material and workmanship to deliver high performance and recoil reduction, keeping you on target, while increasing accuracy. Available in 416 Stainless Steel; coated with durable and impact resistant Cerakote paint. Grizzly Gunworks Clamp-On Muzzle Brakes are made custom for your HK SL8 rifle; according to your specifications, therefore, producing a uniquely designed Muzzle Brake to perfectly fit your firearm. Grizzly Gunworks Clamp-On 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 Muzzle Brake with zero gunsmithing. You are purchasing a Clamp-On Muzzle Brake that is made for a non-threaded barrel measuring 0.788". Grizzly Gunworks offers Muzzle Brakes for threaded and non-threaded barrels. 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 HK SL8 Rifle Clamp-On 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 $50.00 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.


  • Approximate Dimensions:

    Length : 3.0"
    Width: 1.5"
    Thickness: 1.1"
  • Material and Weight:

    416 Stainless Steel: 8.0 oz
  • Recoil Reduction:

    Minimum 90%
  • Caliber:

  • High Strength Machine Bolts:

    Four BLACK or STAINLESS bolts are INCLUDED with every HK SL8 Rifle Clamp-On Muzzle Brake purchase. Bolts are available in a wide range of colors.