I've got an M&P 40 that I'd like to pick up a 357 Sig barrel for. I know where to find new ones, but figured since I'm not in a hurry I'd check here first. I've got 4 other guns in 357 Sig (2 GLocks & 2 Sigs) and I like the caliber and this is my only 40...... deal was too good to pass on. If you've got one and don't use it or need it any more let me know. Thanks for looking.