Smith & Wesson has announced their M&P FPC chambered in 10mm. Previously available in   9mm and   .40 S&W, the rumor mill has been hard at work for a while predicting this one, but the wait is finally over. For 10mm fans, the new FPC will provide increased muzzle energy and terminal performance with its 16.25-inch 9/16×24 threaded barrel while still folding up nicely to stow in a small backpack like its predecessors.