The TruGlo fiber-optic front and rear sight set (brand part no. TG131G2) is a bolt-on upgrade for the Glock 20 and 21, delivering a genuine Tri-Dot sight picture in place of factory plastic sights. TruGlo pairs a red fiber-optic front with a green fiber-optic rear so your eye separates the two instantly, even in dim light. The set is CNC-machined from steel and built for daily carry or duty use on a large-frame Glock. It’s a proven upgrade for shooters who want a faster, more visible sight picture without switching to a full optic.

Key Specifications

• Uses TruGlo’s Tri-Dot aiming system, contrasting front and rear fiber colors for a faster sight picture.
• Front sight features a red fiber-optic insert for instant visual priority.
• Rear sight features a green fiber-optic insert for clear contrast against the front dot.
• Configured as a front/rear set built specifically for the Glock 20/21 sight cut.
• Body is CNC-machined steel, concealing the fiber rods for durability.
• Finished with TruGlo’s Fortress Finish protective coating for long-term wear and corrosion resistance.
• Designed with a snag-resistant profile that draws cleanly from standard holsters.
• Also compatible with the Glock 25, 29, 30, 31, 32, 37, 40, and 41 (excludes M.O.S. models).
• Ships at a lightweight 0.05 lb, adding minimal weight to the slide.

Frequently Asked Questions

What Glock models fit this sight set? It’s built for the Glock 20 and 21, and also fits the 25, 29, 30, 31, 32, 37, 40, and 41 (M.O.S. models excluded).

Will these sights fit my duty or carry holster? Yes — the snag-resistant, low-profile design is built to draw cleanly from standard holsters made for these Glock models.

What makes the front sight easier to see than a factory sight? The red fiber-optic insert gathers ambient light for a bright, fast-acquiring front dot that stands out from the green rear notch.

Buy the TruGlo Fiber-Optic Front/Rear Sight Set for Glock 20/21

A large-frame Glock deserves sights you can actually see fast. This TruGlo Tri-Dot set replaces factory plastic sights with a durable, CNC-machined steel setup built for carry and duty use. Check out our full gun sights lineup and order from our Lubbock, Texas gun shop for fast, direct shipping.