Trijicon DI Night Sight Set for Glock 20/21/21SF/29/30/36/41 - Steel Matte 3-Dot Tritium Green Fiber Optic with Black Retainer

The Trijicon DI Night Sight Set for Glock 20/21/21SF/29/30/36/41 is a dual-illumination aiming solution built for shooters who need reliable sight pictures across any light condition. Unlike traditional night sights that rely on a single illumination method, the DI combines fiber optic brightness in daylight with tritium luminescence in darkness—giving you a constant, visible aiming point whether you're on the range at noon or running a low-light drill. This sight set ships ready to install on your full-size or compact Glock, with both rear and front sights calibrated as a matched pair.

What sets the DI apart is its field-replaceable fiber design. The front sight comes with a green fiber rod installed, backed by a black retainer, and you get two additional green fiber rods in the box—so you can swap fibers in the field if needed, or stock spares without buying a whole new set. The fiber itself is engineered to resist heat and chemical damage, finished using Trijicon's proven ACOG process. The tritium lamp sits beneath a sapphire jewel, amplifying collected ambient light for an ultra-bright sight picture in daylight and a self-illuminated glow when sunlight fades. The 3-dot configuration—rear sight with green tritium, front sight with green tritium and green fiber—keeps your sight picture intuitive and fast.

Built from steel with a matte finish, these sights are made to take hard use. Whether you carry a Glock 20 or 21 for hunting and defense, a compact 29 or 30 for everyday carry, a 36 subcompact, or the full-size 41, the DI set delivers the durability and optical performance Trijicon is known for. Installation requires a standard tritium sight tool (included is a Torx key for fiber changes), and once mounted, you'll have a sight system that works in your favor—bright and easy to acquire in daylight, glowing in your hand in the dark.

Key Features

• Dual-illumination design: fiber optic brightness in daylight, tritium glow in darkness
• Field-replaceable fiber rods—swap them without tools or buy a new sight
• Includes two spare green fiber rods and black retainer
• Sapphire jewel lens amplifies ambient light for ultra-bright daylight sight picture
• Heat and chemical-resistant fiber, Trijicon ACOG-grade finish
• 3-dot green tritium configuration (rear and front)
• Steel, matte-finish construction for durability
• Matched rear and front sight set, ready to install
• Includes Torx key for fiber maintenance and adjustment

Specifications

Frequently Asked Questions

What Glock models does this sight set fit?

The DI sight set is compatible with the Glock 20, 21, 21SF, 29, 30, 36, and 41. It's designed to work across full-size, compact, and subcompact models in these lines.

Can I replace the fiber rod if it gets damaged or dirty?

Yes—that's the key innovation of the DI design. The front sight uses an interchangeable fiber rod, and you get two spare green rods in the box. A Torx key is included to remove and install them in the field without special tools.

Do these sights work in complete darkness?

The tritium component provides self-illumination in darkness, giving you a constant aiming point with zero reliance on ambient light or batteries. In daylight, the fiber optic makes the sight exceptionally bright and fast to acquire.

What's included in the box?

The set includes a matched pair of rear and front sights, two additional green fiber rods for the front sight, a black retainer, and a Torx key for fiber changes and adjustment. All you need is a tritium sight installation tool (not included) to mount them on your Glock.