The Trijicon HD Night Sights (brand part no. GL104Y) are a green tritium three-dot sight set with a yellow-outlined front sight and black-outlined rear, built specifically for the large-frame Glock 20 and 21. Trijicon designed the HD line for tactical shooters who need fast sight acquisition in changing light, pairing a taller front blade ringed in photoluminescent paint with a wider U-shaped rear notch for a bigger visual window under stress. The rear sight’s steeply hooked front surface also assists emergency one-handed slide manipulation.

Key Specifications

• Three-dot green tritium night sight configuration.
• Front sight features a yellow photoluminescent outline around a taller blade for fast acquisition.
• Rear sight features a black outline and a wider U-shaped notch.
• Rear sight’s steeply hooked front surface assists one-handed emergency slide racking.
• Fixed elevation, no adjustment.
• Professional installation recommended.
• Front sight measures 0.144 inch wide and 0.268 inch tall.
• Rear sight measures 0.291 inch tall.
• Direct fit for the large-frame Glock 20 and 21.

Frequently Asked Questions

What pistols do these sights fit? The large-frame Glock 20 and 21.

Is the rear sight elevation adjustable? No, it is a fixed sight with no elevation adjustment.

Can I install these myself? Professional installation is recommended.

Buy the Trijicon HD Night Sights

Upgrade your large-frame Glock with fast-acquisition tritium night sights. Order it from our gun sights selection at our Lubbock, Texas gun shop for fast, direct shipping.