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1. A firearm noise suppressor baffle having a substantially conical portion with a narrowed end and a projectile passageway at the narrow end, the conical portion being formed of at least two material zones, the material zones being made of materials having dissimilar coefficients of thermal expansion from each other with an interface substantially transverse to a bore axis that integrally fuses the material zones together, the baffle including an annularly interrupting gap having a width, the gap formed in at least one of the material zones and extending substantially longitudinal relative to the bore axis from an edge of the baffle.
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