The TruGlo TFO Fiber-Optic/Tritium Sight Set (brand part number TG-TG131GT2Y) equips the large-frame Glock 20, 21, 25, 29, 30, 31, 32, 37, 40, and 41 (except MOS models) with TruGlo’s TFO technology, pairing a green fiber-optic front with a yellow fiber-optic rear, both backed by tritium night sights underneath for a consistently bright sight picture day or night. The fiber optics gather ambient light for a bright, easy-to-distinguish two-color reference in daylight, while the tritium vials take over once the light fades. TruGlo builds the housing at a high mounting profile, snag-resistant so it fits standard holsters without catching on the draw, and the fiber measures 0.060 inches in diameter for a crisp, visible dot.

Key Specifications

• Pairs fiber-optic technology for bright daylight visibility.
• Pairs tritium night-sight technology for low-light visibility.
• Front sight uses a green fiber-optic/tritium dot.
• Rear sight uses a yellow fiber-optic/tritium reference.
• Built with a snag-resistant design that fits standard holsters.
• Fiber optic measures 0.060 inches in diameter.
• Built at a High mounting profile.
• Compatible with Glock 20/21/25/29/30/31/32/37/40/41 models.
• Excludes MOS slide-cut variants.
• Delivers the same bright sight picture whether shooting in daylight or near-total darkness.

Frequently Asked Questions

What Glock models does this fit? The 20, 21, 25, 29, 30, 31, 32, 37, 40, and 41, except MOS models.

Why are the front and rear sights different colors? The two-color scheme makes it faster to distinguish the front sight from the rear for accurate alignment.

Buy the TruGlo TFO Fiber-Optic/Tritium Sight Set – Green Front, Yellow Rear, Glock 20/21/25/29/30/31/32/37/40/41

Get a fast, two-color sight picture that works day and night. Order it from our Truglo lineup, part of our gun sights selection, at our Lubbock, Texas gun shop for fast, direct shipping.