I have a M&P 9 I replaced my Taurus 709 with. The Barrel is obviously a victim of poor quality control. The chamber cut where the chamber meets the rifling was not cut all the way at the factory causing it to not allow rounds go fully into battery after firing about 50+ rounds through it "when even slightly dirty". After you clean it, It will do fine again but it's always a tight fit making it hard to pull the slide if you wish to empty a live round. A gunsmith cleaned it up helping it a little bit. But he told me it needs a barrel ultimately. I can't get S&W to replace it since I am not it's original owner. For now it functions and feeds fine. It's just a shame it has this issue. Anyone know any place to get a cheap barrel? I looked and all I can find is match barrels that cost over $100 and I would rather just trade the thing off than pay that. Any help would greatly appreciated. Last S&W I ever buy. I should have kept the damn Taurus lol.