fn 509 – top 9mm of the line

Last updated: November 15, 2022

The FN 509 is a double-action 9mm pistol that’s striker-fired and made of polymer. It originates from Columbia, South Carolina by FN America which is a division under FN Herstal. Additional variants of this model include the tactical, midsize, and compact models too.

FN 509 has four safeties, although only one of them (the trigger safety lever) is externally visible. The other three are a striker block, a drop safety and a trigger disconnect safety.

The muzzle’s thread protector has an internal O-ring to provide some resistance so it doesn’t loosen and fall off under recoil. When comparing the FN 509 to the Glock Gen 5, The FN 509 looks better from a distance.

However, when examined up close, it is clear that the Glock’s frame is of higher quality read more about The rise of the Glock and Why is so popular pistol for everyone is everywhere. Additionally, the frames of both generations 3 and 4 feel more similar to the FN 509 than the Gen 5 does. Consequently , in terms of overall quality fabrication , the Glock surpasses the FN 509.


The FN 509 pistol is a versatile and powerful option for self-defense. It has a 9mm caliber and double-action operation, making it a reliable choice for protection.


The FN 509’s sights are rather average as they’re Fixed and located towards the rear of the slide like most handguns. They provide a good sight radius for 5.79 inches which helps you line up shots accurately, however they’re not Adjustable. The three dots placed on the sights are luminescent so that aiming in all lighting conditions is possible.


FN has created a polymer frame that comes with a replaceable steel frame. The MIL-STD-1913 rail provides wearers a solid surface to mount their optics or tactical lights. Textured grip panels guarantee those holding the weapon can maintain grip, regardless of conditions.

How it works

The FN 509 is a semi-automatic pistol that operates using striker-fired ignition. fn Herstal created it in collaboration with Browning Arms Company, and Hi-Power pistols served as its inspiration.

Weight and Dimensions


The FN 509 pistol is 26.9 ounces in weight and has an overall length of 7.4 inches. The twist rate is 1:10″ RH and the height is 5.56 inches. The width is 1.35 inches that make the gun very comfortable to carry and conceal. The FN 509 is a great option for those looking for a reliable and powerful self-defense pistol.


If you’re looking for a dependable and long-lasting handgun,

The FN 509 barrel pistol is an excellent choice with its stainless steel construction and cold hammer-forged barrel making it a durable gun. The polished chamber and recessed target crown reduce wear on the gun over time, so you can enjoy shooting it for years to come!


FN 509 MRD (custom)
FN 509 MRD (custom)

The FN 509 barrel pistol is an excellent choice for anyone looking for a dependable handgun. Stainless steel construction and cold hammer-forged barrel add to its durability, while the polished chamber and recessed target crown help reduce wear over time. Thank you for choosing the FN 509 barrel pistol!


F509 pistol is an outstanding choice for those looking for a dependable and long-lasting handgun. It’s built with stainless steel construction and has a cold hammer-forged barrel that adds to its durability. The polished chamber and recessed target crown also play a part in reducing wear on the gun over time.

Additionally, the textured grip panels guarantee that users can maintain grip regardless of conditions. Finally, the sights are luminescent so they can be used in all lighting conditions.


The FN 509 is a great gun, but there are some pros and cons to consider

The pros are that it’s lightweight, easy to shoot, and has a low recoil.

The cons are that it can be difficult to disassemble and reassemble, and the takedown process can be a bit confusing for first-time shooters.

Overall, the FN 509 is a great gun that’s perfect for anyone looking for an easy-to-use 9mm pistol.

where to keep gun for home defense ?

More potent versions of the recoil spring assembly are available as an upgrade if you’re looking for something with more oomph. Some other popular options to consider include a new barrel, trigger, and sights.
Upgrades like this will help you shoot more accurately by reducing muzzle flip. Be careful though- if you’re not experienced, it’s best to consult a gunsmith so that you don’t accidentally void your warranty or worse, injure yourself.

The original idea of this gun

FN 509 was originally designed as a replacement for the aging M1911 pistol, which had been in military service since 1911. The FN 509 was designed with modern advancements in mind, such as striker-fired operation and a low bore axis, to create a more ergonomic and accurate pistol. Additionally, the FN 509 is available in both 9mm and .40 S&W calibers to accommodate a variety of shooters.

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