The FNX™ series is a page out of the book of FN's FNP service pistol series. FNX pistols are hammer-driven (as opposed to the striker-fired operation of the FN FNS series), double-/single-action, and feature fully-ambidextrous magazine release, slide stop lever, and safety/de-cocking levers, as well as stainless steel slide and barrel, a polymer frame with interchangeable back-straps, and a MIL-STD 1913 rail beneath the barrel for mounting of lasers and tactical lights.  Improving on the FNP-45 Tactical" developed for the U.S. Joint Combat Pistol Program" the FNX-45 Tactical was born and bred for battle. Like its legendary FN forefathers" this combat handgun was designed to not only survive the battlefield" but to emerge victorious. It is the latest in technological advancements in handgun engineering" offering .45 ACP performance and a host of unique features that no other handgun can match. FN FNX-45 Tactical MRD WITH Vortex Viper RDS, NON-THREADED 45 Auto (ACP) 5.3" FDE Pistol - 10+1 Rounds - Features include Vortex Viper Optic Installed and Suppressor Height Trijicon Fixed 3-Dot Sights (Standard). This model comes with a Vortex Viper red dot sight installed.  This model is NON-THREADED, 10 Rounds, New York Compliant, Colorado Compliant, AND Washington Compliant.