The FN FNS pistol is a series of striker-fired semi-automatic, polymer-framed pistols manufactured in Fredericksburg, VA, by FN America, a division of Fabrique Nationale d'Herstal.[8] The pistol is chambered for the 9×19mm Parabellum and .40 S&W cartridges.

TypeSemi-automatic pistol
Place of originUnited States
Service history
Used bySee Users
Production history
ManufacturerFN America
VariantsSee Variants:
  • 25.2 oz (710 g) (FNS-9)[2]
  • 26.5 oz (750 g) (FNS-9 Long Slide)[3]
  • 23.4 oz (660 g) (FNS-9 Compact)[4]
  • 27.5 oz (780 g) (FNS-40)[5]
  • 29.7 oz (840 g) (FNS-40 Long Slide)[6]
  • 25.8 oz (730 g) (FNS-40 Compact)[7]
  • 7.25 in (184 mm) (FNS-9)[2]
  • 7.25 in (184 mm) (FNS-40)[5]
Barrel length
  • 4 in (102 mm) (FNS-9)[2]
  • 4 in (102 mm) (FNS-40)[5]
  • 1.55 in (39 mm) (FNS-9)[2]
  • 1.55 in (39 mm) (FNS-40)[5]
  • 5.5 in (140 mm) (FNS-9)[2]
  • 5.5 in (140 mm) (FNS-40)[5]

  • 1 in 10" RH Twist (FNS-9)[2]
  • 1 in 16" RH Twist (FNS-40)[5]
ActionShort recoil operated, locked breech. tilting barrel
Feed systemDetachable box magazine; capacities:
  • 17 rounds (FNS-9)[2]
  • 14 rounds (FNS-40)[5]
SightsThree-dot combat sights (standard or night)

Design details

The FNS pistol is based on the FN FNX.[1] The FNS has similar ergonomics to the FNX but introduces a double-action, striker-fired functionality.

Operating mechanism

Like other FN pistols, the FNS is a short-recoil-operated pistol. It is a pre-set striker fired semi-automatic pistol, meaning the trigger system is of the hammerless short double-action-only type. The trigger pull is between 25 N (5.6 lbf) and 35 N (7.9 lbf).[2]

All variations also include a hammer-forged stainless steel barrel, Picatinny rail, fixed three-dot combat sights (standard or night sights), and a loaded chamber indicator on the right side.[9]

Standard features

The FNS series of the pistols all include ambidextrous magazine releases, and slide stop release levers.[9]


The FNS has 4 standard safety features:

  1. A trigger safety, similar to that seen on a Glock, which prevents the weapon from discharging without pressure on the trigger.[9]
  2. A firing pin safety which prevents the striker from hitting the primer without the trigger being pulled.[9]
  3. A drop safety which prevents the sear from rotating to release the striker unless the trigger is pulled.[9]
  4. An out-of-battery safety which prevents the sear from releasing the striker if the slide is not fully forward.[9]

As a fifth safety feature the FNS pistols can also have an optional manual safety.


A "long slide" version, known as the FNS-9LS and FNS-40LS, was introduced in 2012 designed in partnership with the Baltimore County Police Department specifically for the department.

A compact version, known as the FNS-9C and FNS-40C, was introduced in 2015. The compact version comes with two short magazines. One has a "pinkie rest" baseplate while the other has a flat baseplate. Magazine capacity for the 9mm version is 12 rounds and for the .40 S&W version is 10 rounds. The compact versions can also use full size magazines with the addition of a removable grip sleeve.

A full size 9mm pre-loaded striker pistol, known as the FN 509, was introduced in early 2016 with it being part of the XM17 Modular Handgun competition. It was released for public sale in 2017. It is fully ambidextrous and comes in two versions, one version having manual safety and another without it. It also comes with a Stanag type rail for various attachments.[10]

All versions are available in two finishes: a standard black finish featuring a dark colored/nitrided slide and matte black frame or a two-tone finish featuring a silver colored stainless steel slide and matte black frame.[2][5] At least one variant, the FNS-9C (compact) is available in solid dark earth coloration.


  •  United States: The Baltimore County Police Department no longer uses the FNS-40LS pistol, and is replacing them with the Glock 17 Gen 5.[11]
  •  United States: The Columbia, South Carolina Police Department NO longer uses to the FNS-9 pistol in 2012.[12]
  •  United States: The Arizona Department of Public Safety NO longer uses the FNS-40LS pistol in 2015.
  •  United States: The Custer City Police Department, Custer County, Oklahoma has named the FNS-9/.40 as the department standard carry sidearm paired with either a TLR-1 or TLR-2 weapon mounted flashlight.
  •  United States: A few police agencies in Kansas use the FNS pistol and a few are the Salina, Kansas Police Department and Osawatomie, Kansas Police Department both issue the FN FNS-40. Salina Police Department uses the FNS-40, while Osawatomie Police Department uses the FNS-40LS.
  •  Belgium: The Local police of Liège (Zone de Police de Liège) uses the FN FNS-9 pistol.


  1. "FNS Series". FNH USA. Archived from the original on 20 January 2013. Retrieved 19 December 2012.
  2. "FNS-9". FNH USA. Archived from the original on 15 January 2013. Retrieved 19 December 2012.
  3. "FNS-9 Long Slide". FNH USA. Archived from the original on 27 December 2014. Retrieved 8 January 2015.
  4. "FNS-9 Compact". FNH USA. Archived from the original on 7 January 2015. Retrieved 8 January 2015.
  5. "FNS-40". FNH USA. Archived from the original on 20 January 2013. Retrieved 19 December 2012.
  6. "FNS-9 Long Slide". FNH USA. Archived from the original on 24 December 2014. Retrieved 8 January 2015.
  7. "FNS-40 Compact". FNH USA. Archived from the original on 2 January 2015. Retrieved 8 January 2015.
  8. "About Us". FNH USA. Archived from the original on 3 January 2013. Retrieved 19 December 2012.
  9. "FNS-9". FN Herstal. Retrieved 19 December 2012.
  10. DefenseWebTV (22 November 2017), Milipol Paris 2017 News Internal State Homeland Security Police exhibition France Day 2, retrieved 24 November 2017
  11. "Baltimore County PD picks FNS-40LS for duty". www.guns.com. 3 September 2013. Retrieved 7 September 2013.
  12. "Archived copy". Archived from the original on 2 October 2013. Retrieved 28 September 2013.CS1 maint: archived copy as title (link)

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