Krebs Custom Self Timing I.M.S Muzzle Brake with Jam Nut M14x1 Thread Steel Matte

The Krebs Custom I.M.S Interchangeable Muzzle System is produced so that the user can have a barrel of 16.25" Overall Length and still be able to switch various muzzle devices (from flash suppressor to muzzle brake ) as desired. The various parts of the I.M.S. are made of 4140 steel that's been heat-treated to 40 Rockwell, with a black oxide finish (the exception to this is the muzzle brake attachment, which is made of Grade 5 titanium, with a black titanium hardcoat finish). The open 4-prong "base" muzzle attachment is a very effective flash suppressor. The use of factory ammunition will produce, at best, only a few sparks at the muzzle. This "base" unit can also act as a harmonic dampener when installed on a 14.5" barrel. The total weight of this unit is 4.5 oz., and the overall length of the unit is 2.9", which means it will extend only 1.95" from the muzzle when installed. The closed-end "birdcage" compensator sup...