| FN 509 | |
| Origin: | United States |
| Type: | Semi-automatic pistol |
| Is Ranged: | yes |
| Design Date: | 2015 |
| Manufacturer: | FN America |
| Unit Cost: | $649 (MSRP) |
| Production Date: | 2017–present |
| Variants: | See Variants |
| Weight: | 26.9oz |
| Length: | 7.4inches |
| Part Length: | 4inches |
| Width: | 1.35inches |
| Height: | 5.56inches |
| Cartridge: | 9×19mm Parabellum |
| Action: | Double action |
| Feed: | Box magazine |
| Sights: | Fixed 3-dot (standard); Tactical and MRD variants accept red dot sights |
The FN 509 is a polymer frame striker-fired semi-automatic pistol manufactured by FN America, a division of FN Herstal. It is chambered in 9×19mm Parabellum featuring double-action operation and a Picatinny rail located forward of the trigger guard. Tactical, midsize, and compact variants have also been made available.
As part of the XM17 Modular Handgun System competition (MHS) initiated in September 2015, FN Herstal entered a polymer-framed, striker-fired pistol, derived from the FN FNS.[1] After SIG Sauer won the competition in January 2017 with a modified version of the P320,[2] [3] FN America brought a version of their entry, now known as the FN 509, to the commercial market.
FN sought consultation from retired Delta Force operator Larry Vickers during early development of the FN 509.[4] FN America stated that during development and testing of the MHS entry and the FN 509, over a million rounds of ammunition were used.[5]
The FN 509 is a striker-fired handgun with a stainless steel slide with ferritic nitrocarburizing finish and a polymer frame. Black and flat dark earth (FDE) colorings are available. Barrel length is 4inches. The slide has serrations on both front and back, for easy slide manipulation. There is a full-sized grip, housing 17-round magazines; 10-round magazines are available for states with a high-capacity magazine ban.
The backstrap of the grip accepts interchangeable inserts; one arched and one flat.[6] Instead of a manual safety, the 509 includes an integrated trigger safety (the articulated trigger type like the FN FNS) as part of its four passive safety systems: a striker block, a drop safety, a trigger disconnect and a trigger safety lever.[7]
Magazine releases and slide locks are present on both side of the gun.
Several variants of the FN 509 have been made available:[8]
Also available are an inert training pistol,[9] and a Simunition (simulated ammunition) pistol.[10]
The subcompact FN 503, introduced in March 2020, uses the "design, performance and reliability standards" of the FN 509.[11]
| Specification | FN 509 | FN 509 Tactical | FN 509 Midsize | FN 509 Midsize MRD | FN 509 Compact MRD | |
|---|---|---|---|---|---|---|
| Barrel length | 4inches | 4.5inches | 4inches | 3.7inches | ||
| Overall length | 7.4inches | 7.9inches | 7.4inches | 6.8inches | ||
| Overall width | 1.35inches | |||||
| Height | 5.56inches | 5.75inches | 5.2inches | 4.8inches | ||
| Weight | 26.9oz | 27.9oz | 26.5oz | 25.5oz | ||
| Magazine capacity | 17-round | 17-round | 15-round | 12-round | ||
| Optics mount | No | Yes | No | Yes | Yes | |
| Color | Black or FDE | Black or FDE | Black | Black or FDE | ||
| Reference | [12] | [13] [14] | [15] | [16] | [17] [18] | |
United States: Standard-issue sidearm (MRD-LE variant) of the Los Angeles Police Department as of 2021.[19]