KIES linear compensator ↑ https://www.youtube.com/watch?v=PY4-fmql19w HERA ARMS linear compensator ↑ "Jump Is Taken Out Of Guns By Cylinders On Muzzle" Popular Mechanics, August 1932 ↑ A muzzle brake manufacturer on pros and cons and recoil reduction of muzzle brakes Archived 4 July 2008 at the Wayback Machine.