Patent ID: 8627755

Claim:
A muzzle brake for attachment to the barrel muzzle of a firearm having a bore centerline comprising: (a) a first and a second section threadedly secured to each other to form a unitary cylindrical structure, (b) said first section including internal threads to permit the section to be threadedly secured to said barrel muzzle, and having an expansion chamber communicating with said muzzle to receive expanding gases behind a projectile exiting from said muzzle; (c) a plurality of ports circumferentially spaced about said first section communicating with said expansion chamber to permit said expanding gases to escape to the atmosphere; (d) said ports positioned to direct gases radially outwardly from said muzzle brake and from expansion chamber and inclined at an angle with respect to said bore centerline toward the firearm to thereby produce a counter-recoil force; (e) a wiper section within said second section extending along the firearm bore centerline from said expansion chamber to the atmosphere to permit the passage of a projectile and expanding gases; (f) said second section having a baffle surface extending from said wiper section to said ports; and (g) said baffle surface extending radially from the bore centerline to entrances to said ports and inclined with respect to the centerline at an angle 78°+/−5°.