The Trijicon Fiber Optic Sight Set for Glock Large Frames provides a highly visible, battery-free tactical aiming system engineered for professional duty and defensive use. Utilizing cutting-edge passive light-gathering fiber technology inspired by the iconic ACOG series, it forms an ultra-bright daytime aiming point that naturally adapts to ambient light conditions. The sight set features a sleekly contoured, non-illuminated black rear blade intentionally designed to absorb glare, allowing your focus to lock entirely onto the glowing front post. CNC-machined entirely from robust solid steel, this assembly easily handles aggressive holstering, heavy recoil, and regular training misuse. Furthermore, the rear sight is shaped with a steeply hooked forward face explicitly tailored for situational, emergency one-handed slide operation against belts or rigid obstacles. Trijicon Fiber Optic Sight Set w/ Red or Green FS for Glock 20/21/29/30/36/40/41 MOS, S, & SF 601190