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F8 Night Sights - FN


Product Features

  • Tritium front sight with high contrast orange glow dot
  • Photoluminescent glow dot absorbs ambient light and glows in low light
  • Wide notch rear with tritium dot and blacked-out notch
  • Figure 8 sight picture
  • Proudly manufactured in Fort Worth, TX
  • Free Ground Shipping

  • American Made

  • Safe Payments

  • Amazing Selection

Simple Sight Focus Draws your Focus to the Front!

XS Sights F8 Night Sights for FN handguns have been specifically designed to cater to the needs of FN 509 pistol owners. These sights offer an exceptional sight picture and increased front sight focus, enabling fast and precise sight acquisition. With a large, high-contrast front post and a wide-notch rear sight, the F8’s enhance visibility of the front post even in poor lighting conditions, ensuring shooters can maintain their target focus.

One of the key features of the F8’s is the incorporation of a tritium front sight, which is equipped with our proprietary photoluminescent orange Glow Dot. This Glow Dot effectively absorbs ambient light and emits a luminous glow in low-light situations. This feature guarantees that the front sight remains highly visible, even in complete darkness, providing shooters with the confidence and accuracy they need in challenging environments.

These night sights for FN 509’s employ a figure-8, 2-Dot alignment system that simplifies the rear sight, drawing the shooter's attention to the front sight for precise indexing. Additionally, the F8 Night sights are taller than most traditional sights available on the market. This taller profile allows for a more natural sight alignment and serves as reliable backup iron sights for pistol reflex sights, providing shooters with added versatility and redundancy in their aiming systems.

The design of the F8 Night Sights represents a significant milestone in sight picture technology. Developed to leverage the advantages of our express sight system, our F8 Night Sights address the shortcomings of conventional notch and post sights through the implementation of a large front blade and a wider-than-usual rear notch. These design enhancements contribute to a more intuitive and efficient sight alignment, resulting in improved shooting accuracy and target acquisition.

Shooters can confidently rely on the exceptional notch and post sight picture that our F8 sights provide. Whether in daylight or low-light conditions, these sights ensure the front sight remains visible, empowering shooters to remain prepared for any engagement, regardless of the lighting conditions.

Product Features

  • Tritium powered front and rear sight 
  • High-contrast colored front sight 
  • Glow dot absorbs ambient light and glows in low light
  • Figure 8 sight picture prevents confusing front and rear
  • Rear sight overhang reduces glare
  • Anti-reflective rear tritium lens
  • Rear sight ledge for one-handed slide manipulations
  • Durable CNC machined from solid steel bar stock by our in-house machine shop.
  • 12 year warranty on tritium
  • 30 Day Satisfaction Guarantee
  • Fits standard holster options
  • Easily installable by sight pusher tools or using a hammer and punch.

View Written Installation Instuctions or Watch Install Video.

About XS Sights

At our core, we are more than just a business; we are a small, second-generation family-owned company based in Fort Worth, TX. We take immense pride in our roots and our commitment to providing exceptional products and services to our customers, who we consider an extension of our family. Our passion for firearms runs deep, and it is reflected in everything we do.

We aim to make shooting experiences an accessible for everyone, so if you have color vision issues and can’t see your front dot, call us and we will ship you another color. Over 5% of the population experiences some degree of color blindness, and we are committed to accommodating this portion of our customer base.

When you choose to purchase night sights from XS Sights, you become part of our extended family, and we are honored to have you on board!

Prop 65 warning WARNING: This product can expose you to lead, which is known to the State of California to cause cancer and birth defects or reproductive harm. (For more information go to

Tritium Products — XS Sights warrants all handgun sights containing tritium to be free from defects in material and workmanship. Tritium illumination is warranted to glow for twelve (12) years. This warranty applies only to the original purchaser. Proof of purchase is required for an RMA. If this product is found to be defective, the manufacturer's only obligation is to replace the product at the manufacturer's discretion, provided that the product has not been damaged through misuse, modifications, neglect, or mishandling. XS Sights will not be responsible for product removal or installation labor costs. — Tritium illumination will dim throughout the product's life and is not subject to warranty claims. This warranty shall not apply to the finish on any portion of the product or weathering, as this is considered normal wear and tear. Sights improperly installed are not subject to warranty. — XS Sights only warrants products sold through authorized resellers. — All international sales are final and do not qualify for this warranty policy. Some authorized international resellers carry common warranty items to provide for their customers. For more information, please see our International Shipping Policy.