okey dokey been to planet and..........they dont have them yet! they are due to arrive this afternoon so i couldnt get a look at one.
did get some info tho....its a two part barrel with a reverse thread on the front section so you can take it off a cocker without resorting to a strap wrench and swearing at it. its not a kit, although there are 3 different bore backs available, chris wasnt sure on the sizes but thinks they are .686, .689 and .694 with fronts in both 14 and 16 inch.
its about time someone reversed the thread on a two part barrel! and if it shoots half as good as the jacko barrels planet did years ago ill be happy