The FN 509 pistol (USA)

The FN 509 pistol was designed by the FN America LLC, the US-based subsidiary of the famous Fabrique Nationale Herstal arms factory, located in Belgium. The FN 509 pistol emerged from the XM17 Modular Handgun System (MHS) requirements, issued by the US military in 2015.

The FN 509 pistol with an optional manual safety

The FN entry lost the trials to the SIG Sauer P320 pistol, which was subsequently adopted as the US M17 pistol. Despite this failure, FN America brought the FN 509 handgun to the market, offering it for the domestic law enforcement, security and civilian buyers, as well as for export. In 2021 the FN 509 MRD-LE pistol was officially adopted as the new duty sidearm of the Los Angeles Police Department (LAPD).

The FN 509 MRD Tactical pistol with the Red Dot sigt and extended magazine

The FN 509 pistol is a short-recoil operated, locked breech handgun. It uses a traditional Browning-type action with tilting barrel, which is controlled by a cam lug below the breech. Locking is achieved by the single lug that engages the enlarged ejection port in the slide. The frame is made from an impact-resistant polymer, and has an insert made from steel, which bears slide rails. Grip frame is made with detachable backstraps, which are available in three basic sizes to better accommodate palms of different sizes. Striker-fired trigger unit has several internal automated safeties, plus a trigger safety. All basic variations of the FN 509 pistol are offered without manual safeties, but an alternate configuration features ambidextrous frame-mounted manual safety levers. Ammunition is fed from double stack, single feed magazines. Magazine release button is located at the base of the trigger guard and can be easily set up for use by either hand.

FN 509 Midsize pistol

FN 509 Compact pistol

The FN 509 pistol features fixed, removable iron sights and an acessory Picatinny rail below the barrel. Optional MRD versions feature the slides with milled mounting plates to accept various Micro Red Dot sights.