FN FNS-40/FNX-40

Seller Description For This Firearm

Psj009108
Comes with box and 2 spare mags
The FN FNX-40 is a full-size, double-/single-action (DA/SA) semi-automatic pistol made by FN America, chambered in the .40 S&W cartridge.

It was introduced in 2009 as part of the FNX series, which succeeded the FNP line.

Key Specifications

Caliber: .40 S&W

Capacity: 14 rounds in standard magazines (some variations and restricted-magazine versions may be lower)

Barrel Length: 4.0 inches, cold hammer-forged stainless steel; twist rate 1:16″ RH.

Overall Length: ~7.4 inches.

Height: ~5.45 inches.

Width: About 1.55 inches.

Weight (unloaded): ~24.4 ounces.

Features & Design

Frame & Build: Polymer frame with steel slide rails. The grip has checkered and ribbed texture panels; two (or in later versions four) interchangeable backstraps allow fitting to different hand sizes.

Slide & Barrel: Stainless steel slide with front and rear serrations to assist with manipulation. Barrel is cold hammer-forged, with polished chamber and feed ramp for reliable feeding.

Operating Controls: Fully ambidextrous controls—safety/de-cocking lever, slide stop, and magazine release are mirrored on both sides. It uses a ring-style external hammer.

Sights: Comes standard with fixed 3-dot sights. There are options for night sights (tritium) on some models.

Rail & Accessories: Under-barrel MIL-STD-1913 accessory rail for mounting lights or lasers.


Pros & Trade-Offs

Pros:

The DA/SA trigger gives a safer “first-shot” heavier pull with a manual decocker for safer carry.

High capacity for a .40 S&W in a full-size platform, giving good firepower.

Good ergonomics with alternate backstraps, ambidextrous controls, and solid build materials.

Reliable feeding and durability: the stainless slide and barrel, cold hammer forging, etc., are known for ruggedness.

Trade-Offs:

Being a full-size pistol, it’s larger and heavier—less ideal for deep concealment or extended carry compared to compact/slim models.

Recoil is more noticeable than smaller 9mm handguns, especially being .40 S&W, though mitigated somewhat by the weight and frame design.

More complexity (DA/SA mechanism, manual safety / decocker) means more parts, more learning curve, and slightly more maintenance.

Role & Ideal Usage

The FNX-40 is well suited for people who want a duty or home-defense handgun with:

Strong stopping power (.40 S&W) and good magazine capacity.

A robust, rugged build that can take wear and deliver reliable performance.

Ambidextrous features and control versatility for left or right hand shooters.

A pistol that handles well for those who prefer full size—less compromise in grip, sight radius, etc.

If you like, I can compare the FNX-40 directly to the FNX-9 or some other pistols (like the P365, LCP MAX) to show how they differ in handling, ammo cost, recoil, etc.

UPC	ECOM00475215
Action	SEMI AUTOMATIC
Barrel Length	4.3" BARREL
Caliber	.40 S&W
Capacity	14 ROUNDS
Finish	BLACK