US Patent 10345070 Sound suppression device for a firearm

A sound suppression device for a firearm includes an inner core and an outer tube surrounding the inner core. The inner core defines a central chamber extending the length of the inner core and has axially spaced baffles that define expansion chambers in fluid communication with the central chamber that enable hot gases generated by the firearm to expand and cool. A cover disposed between the outer tube and the inner core closes the expansion chambers and separates the expansion chambers from the outer tube.