The sprite doesn't seem to be changeable, as far as I've know, <b>but I could be very wrong</b>.
It used to be located in the crosshairs.spr file, which was located within pak0.pak, before the cache file system was introduced (with Steam). The .pak file is now part of half-life.gcf.
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It used to be located in the crosshairs.spr file, which was located within pak0.pak, before the cache file system was introduced (with Steam). The .pak file is now part of half-life.gcf.