From The Manufacturer/Wikipedia/People Smarter Than Us:
The FNX™ service pistol was introduced in 2009 and incorporates many of the ergonomic improvements initially developed under the U.S. Joint Combat Pistol Program for the FNP™-45 USG. The FNX™ is a double-action/single-action hammer-driven pistol optimized for the 9 mm, .40 S&W and .45 ACP. Its manual safety/decocking levers, slide stop lever and magazine release are all fully ambidextrous for ease of operation with either hand and from any firing position.