Magnum Slimline Muzzle Brake Blue InstalledAvailable Installed with BLUE Finish or FRENCH GRAY (Blue is pictured above) These brakes feature a large expansion chamber that compresses muzzle gases so they’ll accelerate as they exit the ports. No ports on the bottom… no kicked up dust. Recoil is reduced approximately 42-45%... eliminates muzzle rise on chamberings up to 45 cal. Finished Blue. These fit muzzle diameters from .700 to .850 inch and add approx. 1" to barrel length. Threads are 5/8-28. This price includes our Precision Installation Process. Please use Work Order Form. See all of our muzzle brakes plus our installation process on our Muzzle Brake Home Page.Allow approx. 6-8 weeks for installation.