Gun muzzle sound suppressor

A gun muzzle sound suppressor comprising:

• (a) a plurality of segments, wherein each segment among the plurality of segments comprises a cylindrical housing having an inner surface, an outer surface, a breechward end, and a muzzleward end, wherein said each segment further comprises an inner vane configured as a bell, said inner vane being fixedly attached to the inner surface of said each segment's cylindrical housing, wherein said each segment further comprises a plurality of outer vanes fixedly attached to the outer surface of said each segment's cylindrical housing, wherein each outer vane among said plurality of outer vanes has a breechward end coinciding with the breechward end of one of the segments' cylindrical housings, wherein said each outer vane has a muzzleward end coinciding with the muzzleward end of said one of the segments' cylindrical housings, and wherein said each outer vane extends helically from its breechward end to its muzzleward end;
• (b) an outer housing having an inner surface, wherein the outer housing is fitted for sliding receipts of the segments, wherein upon said receipts of the segments, the plurality of outer vanes contact the outer housing's inner surface;
• (c) a pair of rings fixedly attached to the outer housing, wherein one of the rings among said pair of rings comprises a shoulder having a breechward end, said shoulder being positioned muzzlewardly from a muzzleward-most segment among the plurality of segments, the other ring among said pair of rings being positioned breechwardly from a breechward-most segment among the plurality of segments;
• (d) a multiplicity of of helical gas passage channels, wherein each helical gas passage channel among the multiplicity of helical gas passage channels resides between one of the segments' cylindrical housings and the outer housing, and wherein a plurality of channels among the multiplicity of helical gas passage channels resides between said muzzleward-most segment and the outer housing;
• and
• (e) a plurality of inwardly opening slots within the breechward end of the shoulder, wherein each inwardly opening slot is adapted to inwardly channel gas from one of the gas passage channels among the plurality of gas passage channels.