US Patent 10458738 Blast overpressure reduction firearm system and method

A firearm overpressure reduction system is disclosed having a muzzle that further includes a converging section, a throat section and a diverging section. The converging section is in direct communication with the throat section that is in direct communication with the converging section. The converging section has a converging parabolic arrangement and the diverging section has a diverging parabolic arrangement that leads to an exit area for a bullet fired. Another system and methods are also disclosed.