mx3 special top single bbl. fits everything mx8. 34" no step ramped tapered rib. according to my gary bulley (unloader) bore guage .738 bore-.036 choke. two slight scratches near porting on port side of barrel. not evident in pics of porting but held barrel at a proper angle to get them in a pic. been away from the game for a while. NOW REDUCED $1,300. all trades considered. for faster response call 727-643-7075 or pm me as they go straight to my I-phone which I've barely figured out how to use. thanks for looking, joe pires