USED Trijicon HD Yellow Outline Night Sight Set for FN509 FN104-C-600991 - REAR SIGHT ONLY USED10393

The FN 509 is a serious duty and defensive pistol that rewards the shooter who pairs it with serious sights - and the Trijicon HD Night Sights FN104-C-600991 delivers the HD front sight acquisition advantage specifically for the FN 509 with a yellow photoluminescent front outline that creates warm, high-contrast front sight visibility across every lighting condition from bright daylight to complete darkness.

The FN104-C-600991 is designed specifically for the FN 509 sight configuration - a purpose-built fit that installs correctly and delivers proper HD sight alignment on this specific platform. Every Trijicon night sights HD set is engineered to the exact dimensions of the handgun it was made for, ensuring correct installation and reliable performance from the first round through the last. Green tritium lamps are warranted for 12 years from the date of manufacture.

The Yellow Front Night Sights FN104-C-600991 feature a yellow photoluminescent ring around the taller front-sight tritium lamp, which is twice as bright as standard night-sight configurations, creating an immediately dominant visual reference that draws the eye naturally to the front sight under stress, without any deliberate search. The taller HD blade provides greater visual presence above the rear sight in transitional lighting and dynamic defensive situations. Three-dot green tritium illumination provides self-luminous performance in complete darkness without batteries or electronics.

The Trijicon HD Night Sights FN104-C-600991 black rear sight features a wider U-shaped notch for maximum front sight visibility in poor lighting. The steeply hooked front surface of the rear sight enables emergency one-handed slide operation when the situation demands it.

Professional installation is recommended for these Pistol sights.