Expansion chamber assembly and a method of manufacturing the same

Abstract

A expansion chamber assembly for a firearm is disclosed. The expansion chamber contains an outer tube containing a front end and a rear end, a front cap coupled with the outer tube at the front end, a rear cap coupled with the outer tube at the rear end, an inner tube retained within the outer tube by the front cap and the rear cap, wherein the inner cap contains one or more through apertures to allow expanding gasses to move from the inner tube into the outer tube, and one or more exit apertures to allow expensing gases to exit the expansion chamber assembly.

1 - 4 . (canceled) 
     
     
         5 . A expansion chamber assembly for a firearm, the expansion chamber assembly comprising:
 an outer tube comprising a front end and a rear end;   a front cap coupled with the outer tube at the front end;   a rear cap coupled with the outer tube at the rear end;   an inner tube comprising one or more through apertures to allow a portion of expanding gasses to move from the inner tube into the outer tube; and   a sound absorbing materials positioned between the inner tube and the outer tube.   
     
     
         6 . The expansion chamber assembly of claim  1 , wherein the sound absorbing material is a hollow cylinders configured to accommodate the inner tube. 
     
     
         7 . The expansion chamber assembly of claim  1 , wherein the sound absorbing material comprises a star shaped cross section. 
     
     
         8 . The expansion chamber assembly of claim  1 , wherein the sound absorbing material is a flat piece of material rolled around the inner tube.