The FNS offers the simplicity of double-action striker-fired operation with the additional security of a manual safety. All operating controls are fully ambidextrous for ease of use with either hand and from any shooting position. Three-dot night sights are standard with the innovative Deep-V rear sight notch for faster, more precise sighting. Both the slide and barrel are stainless steel with front serrations, while the checkered polymer frame has two interchangeable backstraps and lanyard eyelets. The MIL-STD 1913 under-frame rail accepts tactical lights and lasers.
The FNS-40 Compact offers the same features as the standard models with a 3.6" barrel and a snag-free design for better concealment and a faster draw. The front sight also has a larger dot for faster target acquisition. Every FNS-40 Compact comes with two 10-round and one 14-round magazine. This model has a manual thumb safety.