Low-light shooting demands sights you can trust, and the Rival Arms RA4A231G In-Line MOS Night Sights for G17/G19 deliver exactly that. These tritium night sights pair self-illuminating green tritium with a thoughtful daylight design—an orange ring front sight and white ring rear—so you're covered whether you're running drills at noon or responding to a threat in the dark. The green tritium glow provides that consistent, reliable sight picture when ambient light disappears, while the rounded notch geometry speeds up target acquisition in any lighting condition.

The RA4A231G sits on the Glock 17 and 19 MOS (Modular Optics System) slide, meaning you can pair these sights with a mounted optic for a true duty or competition setup. The in-line profile keeps the sight stack low and fast, and the orange-and-white ring combo gives your eye multiple visual cues for quick alignment. Whether you carry daily, train regularly, or both, these sights handle the full spectrum from bright-sun fundamentals to room-clearing scenarios.

Tritium night sights aren't a luxury—they're a tactical choice. The green phosphorescence ensures you maintain accuracy and confidence when it matters most, without batteries or electronics to fail. Rival Arms has built these with the same uncompromising mindset that defines the brand: purpose-built, reliable, and ready.