The Night Fision Night Sight Set for the Glock 20/21 with an orange front and U-notch rear (Night Fision part no. GLK002007OGZG) is a tritium night sight upgrade built for reliable target acquisition in both daylight and low light. The front sight uses a bright orange outline ring around a green tritium vial for fast daylight acquisition, while the U-notch rear sight is fitted with a matching green tritium insert for a clear, balanced sight picture after dark. Night Fision machines its sight housings in the USA and imports its tritium vials from Switzerland, and the set is a direct fit for Glock 20/21 factory dovetails. It’s a straightforward upgrade for 10mm and .45 ACP Glock owners who want better sight performance than factory plastic sights offer.

Key Specifications

• Front sight features a green tritium vial with an orange outline ring for fast daylight acquisition.
• Rear sight uses a U-notch design with green tritium for a clear low-light sight picture.
• Sight housings are machined in the USA, with tritium vials imported from Switzerland.
• Direct fit for Glock 20/21 factory dovetails, requiring no gunsmith fitting.
• Chambered platform: fits the Glock 20/21 and related large-frame models (29, 30, 36, 40, 41).

Frequently Asked Questions

Will these sights fit other Glock models besides the 20/21? This set is cut for the Glock 20/21 dovetail; check fitment before ordering for other frame sizes.

Do these sights glow only at night, or also stand out in daylight? Both — the orange front ring aids daylight acquisition, and the tritium vials glow in low light.

Buy the Night Fision Night Sight Set for Glock 20/21

Upgrade your 10mm or .45 ACP Glock with sights built for both day and night use. Order it from our Night Fision lineup of gun sights, shipped fast from our Lubbock, Texas gun shop.