I just placed an order for a conversion barrel 40 to 9mm for my M&P CORE 40 S&W from KKM Precision $165.00 plus shipping . I also ordered two 9mm mags from Greg Cote. He had the best price for S&W (1944) mags 9mm 17 round full size $49.90 for two plus shipping. Will post when I get the items and get to the range to see if she works.......:-)