Bought the 444 barrel from Tim50 here last wk. and shot it today with an Aimpoint 5000 red dot - This thing rocks, good groups and reasonable recoil. Tim50 is a great guy to deal with. Look out piggies. Thanks again Tim. (link to bbl pix and muzzel brake story below.) http://www.ottllc.com/specialtypistols/sp31.html