couldnt say about the accusport, but on that same note, there was a fella at the range with one of those carbon fiber barrels. it was incredibly light, i think even lighter than the factory barrel. it was the standard .920 target barrel size, but several inches shorter than most target barrels.
he said it was 160 bux, and it was an absolute tack driver. 1/4" groups @50yds. he didnt say where he got it, but said it was made by magnum research. (his rifle was not a 22mag though, it was 22lr)
being super light, and shorter than normal became quite attractive when i saw how it was shooting.