Apr 7, 2026

US12595983 - Diverging central bore for firearm sound suppressor

An apparatus and methods are provided for a front plate having a diverging central bore for firearm sound suppressors that improves noise and flash characteristics during firing a weapon. The central bore is disposed between a back surface and a front surface of the front plate. An untapered portion of the central bore extends from the back surface to a diverging portion that opens toward the front surface. The diverging portion includes a curvature profile configured to allow for more controlled expansion of high-pressure propellant gases exiting of the suppressor through the central bore. The curvature profile provides an included angle of the central bore that decreases secondary flash events accompanying the expulsion of propellant gases accompanying a fired bullet exiting the suppressor through the central bore. The curvature profile exhibits a cross-sectional area of the central bore that is proportional to a distance along the diverging portion.

Assignee: SureFire, LLC
Inventors: Barry William Dueck, Michael Standen, Eric Hung Leung Chow, Ryan Steven Glasby, Doug Stefanski
Filing date: 2022-08-05

firearmsuppressorsoundnoiseflash

The patent describes a front plate for firearm sound suppressors featuring a diverging central bore designed to enhance noise reduction and minimize flash during firing. The innovative curvature profile of the bore facilitates controlled expansion of propellant gases, thereby reducing secondary flash events associated with the discharge of a bullet.

Claim 1

1 . A front plate for a suppressor, comprising: a central bore disposed between a back surface and a front surface of the front plate; and an untapered portion of the central bore extending from the back surface to a diverging portion wherein the untapered portion extends from a backmost surface of the front plate and meets the diverging portion within an interior of the central bore; wherein the front surface comprises a plurality of elevations, a central portion enclosing the central bore and at least one recess disposed between an outer lip and the central portion; wherein one or more scallops are disposed in the at least one recess and arranged around the central bore; and the recess disposed away from the central bore. a central bore disposed between a back surface and a front surface of the front plate; and an untapered portion of the central bore extending from the back surface to a diverging portion wherein the untapered portion extends from a backmost surface of the front plate and meets the diverging portion within an interior of the central bore; wherein the front surface comprises a plurality of elevations, a central portion enclosing the central bore and at least one recess disposed between an outer lip and the central portion; wherein one or more scallops are disposed in the at least one recess and arranged around the central bore; and the recess disposed away from the central bore.

Google Patents

https://patents.google.com/patent/US12595983

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12595983