Green Tritium Outline Orange Square (non trit) REAR for Glock Gen 1-4

The AmeriGlo Green Tritium Outline Orange Square rear night sight for Glock Gen 1-4 pistols pairs self-illuminating tritium with a high-visibility outline design—giving you a sight picture that works in near-total darkness and bright daylight alike. The green tritium vial glows without batteries or charging, while the orange square outline (non-tritium) provides a secondary aiming reference under ambient light. This rear sight replaces your factory sight and mounts directly on Glock Gen 1 through Gen 4 slides, making it an easy upgrade for duty, home defense, or low-light shooting.

Night sights fundamentally change how your Glock performs when you can't see. Tritium sights glow continuously thanks to radioactive tritium gas sealed inside the vial—you don't do anything but point and shoot. The outline design means you're not relying solely on a glowing dot; the orange square gives you an aiming reference even if the tritium dims with age or in bright conditions where tritium becomes hard to see.

AmeriGlo sights are machined steel, durable through thousands of rounds, and built to the exacting standards Glock users expect. Installation requires removing your rear factory sight and installing this replacement—a five-minute job with a sight pusher or a gunsmith's help. If you're running your Glock in low light or just want the confidence of always knowing where your rear sight is, tritium sights are the simplest, most reliable upgrade you can make.