The Trijicon HD Night Sights for Glock 20, 21, 29, 30, 36, 40 and 41 (brand part no. GL104Y) are a three-dot green tritium set built for shooters who need a fast front sight as the light changes. The front sight pairs a taller blade and a domed sapphire-capped tritium lamp with a yellow photoluminescent outline, and the rear sight is outlined in black with a wider U-shaped notch. That combination speeds front sight acquisition in bright, transitional and no-light conditions. The rear sight also has a steeply hooked front surface for working the slide one-handed in an emergency. Trijicon recommends professional installation.

Key Specifications

• The sight picture is three-dot green tritium, a battery-free glow that stays visible in no-light and low-light conditions.
• The front sight has a yellow photoluminescent outline around the tritium lamp, so the dot reads clearly in daylight and transitional light.
• The rear sight is outlined in black with a U-notch 0.169 inch wide, a clean window that does not compete with the front dot.
• The front blade is 0.144 inch wide and the overall front sight height is 0.268 inch, a taller blade that is easy to pick up quickly.
• The overall rear sight height is 0.291 inch, with a rear blade height of 0.231 inch.
• The rear sight has a steeply hooked front surface for emergency one-handed slide manipulation.
• The front tritium lamp has a domed sapphire cap that focuses the light for a front sight Trijicon rates at twice as bright.
• The tritium gas lamps sit inside protective aluminum cylinders with silicone rubber cushioning, which guards them from heavy recoil and harsh cleaning solvents.
• It fits Glock 20, 21, 29, 30, 36, 40 and 41, including S and SF variants but excluding MOS models.
• The green tritium lamps carry a 12-year warranty from the date of manufacture, and professional installation is recommended.

Frequently Asked Questions

Will these fit a Glock 20 MOS or Glock 40 MOS? No. Trijicon lists this set for Glock 20, 21, 29, 30, 36, 40 and 41, including S and SF variants, and excludes MOS models.

What color is the dot on each sight? Both sights use green tritium lamps. The front sight has a yellow outline around its lamp and the rear sight has a black outline.

Can I install these myself? Trijicon recommends professional installation, and the dimensions it publishes are for reference only.

Buy the Trijicon HD Night Sights for Glock 20/21/29/30/36/40/41

If you run a large-frame Glock and want tritium sights with a more visible front sight than the factory plastic set, this is the Trijicon HD configuration for it. Browse more gun sights at our Lubbock, Texas gun shop for fast, direct shipping.