Feb 10, 2026

US12547790 - Firearm sound suppressor with peripheral venting

An apparatus and methods are provided for a suppressor to be coupled with a muzzle end of a barrel of a firearm to reduce muzzle blast and muzzle flash. The suppressor comprises a housing having a proximal end and a distal end. A front portion within the housing comprises a series of cylindrical gas expansion chambers for attenuating the temperature and energy of propellant gases accompanying a projectile fired from the firearm. An annular gas expansion chamber surrounds the cylindrical gas expansion chambers and directs a portion of the propellant gases from a rear portion of the suppressor to peripheral vents disposed at the distal end. Lateral chambers within the rear portion deflect and rebound a portion of the propellant gases before passing them into the annular gas expansion chamber. Ledges within the annular gas expansion chamber direct the propellant gases distally through suppressor toward the peripheral vents.

Assignee: Surefire, LLC
Inventors: Barry William Dueck, Michael Standen, Eric Hung Leung Chow, Ryan Steven Glasby, Douglas Lawrence Stefanski
Filing date: 2022-09-20

firearmsuppressormuzzleblastflash

The patent describes a firearm suppressor designed to minimize both muzzle blast and flash by utilizing a series of gas expansion chambers and peripheral vents. It also outlines a method for developing suppressors by employing computational fluid dynamics to predict flash behavior without the need for actual firing.

Claim 1

1 . A method for developing proposed suppressors that couple with firearms to reduce muzzle blast and muzzle flash from actual firing, comprising: identifying causes of the muzzle flash; categorizing types of muzzle flash exhibited by a suppressor; developing a model of flash behavior; wherein developing the model further includes developing a computation fluid dynamics-based predictive model by comparing composite and time-average imagery with flash photography of the suppressor; and comparing empirically collected data to simulated data from the computation fluid dynamics-based predictive model for the suppressor to create an algorithm that produces predicted flash performance; and applying the model to a proposed suppressor by inputting simulation results from the computation fluid dynamics-based predictive model for the proposed suppressor into the algorithm to produce predicted flash performance for the proposed suppressor without actual firing the firearms. identifying causes of the muzzle flash; categorizing types of muzzle flash exhibited by a suppressor; developing a model of flash behavior; wherein developing the model further includes developing a computation fluid dynamics-based predictive model by comparing composite and time-average imagery with flash photography of the suppressor; and comparing empirically collected data to simulated data from the computation fluid dynamics-based predictive model for the suppressor to create an algorithm that produces predicted flash performance; and wherein developing the model further includes developing a computation fluid dynamics-based predictive model by comparing composite and time-average imagery with flash photography of the suppressor; and comparing empirically collected data to simulated data from the computation fluid dynamics-based predictive model for the suppressor to create an algorithm that produces predicted flash performance; and applying the model to a proposed suppressor by inputting simulation results from the computation fluid dynamics-based predictive model for the proposed suppressor into the algorithm to produce predicted flash performance for the proposed suppressor without actual firing the firearms.

Google Patents

https://patents.google.com/patent/US12547790

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12547790