Springfield Armory calls it the "M-Factor". It's a redesigned .40 S&W Caliber XD-Service Pistol. Improved magazine capacity from 12 rounds to 16 rounds, replaceable back straps, newer sights, new grip angle, and a new general appearance.
These photos are not from me. The pistol is not on the market yet. But my sources say soon.
5.56x45mm
'Nuff Said....