FN America’s webpage is now live as of January 18th:
Note that the barrel now locks up on the slide’s ejection port. There is an ambidextrous slide stop, and a separate takedown lever. The magazine release is reversible. The front and rear straps are checkered. The sight dovetails are the same as the FN509. FN has reverted to an internal extractor, and the magazine disconnect safety pin is missing from the trigger. FN claims that it will have a 4.5 lbs trigger pull.
The slide and barrel almost appear to be shorter, but FN reports that it is a 4.7″ barrel. This discrepancy must be a visual effect from the grip being lengthened for a 17-round magazine. Folks are going to freak out about the new pistol gaining a half pound in weight over the legacy model.