Rival Arms RA4B231G In-Line MOS Night Sights for Glock 17/19 Green Tritium White Outline

The Rival Arms RA4B231G In-Line MOS Night Sights are a precision pistol sight set engineered for the Glock 17 MOS and Glock 19 family of double-stack 9mm pistols. Built on a rugged steel body finished in black, this set replaces the factory iron sights with a low-profile MOS-compatible configuration designed to co-witness cleanly with a mounted red dot optic on a Modular Optics System slide.

Each sight houses self-illuminating green tritium inserts bordered by a crisp white outline ring, delivering a fast, high-contrast sight picture both day and night. The tritium inserts glow continuously in low light and total darkness without batteries or ambient light, while the bold white outline provides a sharp aiming reference in bright daylight. Both the front and rear sights share an identical green tritium / white outline color scheme for a consistent visual alignment across the sight picture.

Designed specifically for Glock MOS slides, the MOS Low sight height allows an installed red dot optic to remain the primary aiming system, with these iron sights serving as a rugged, always-ready backup. The set installs into the factory dovetails on a compatible Glock slide using standard sight-pusher tooling, with no permanent modifications required.

Rival Arms machines this night sight set to the same tight tolerances trusted by competitive and defensive shooters. What's included: one front sight and one rear sight, ready to install on your Glock 17 MOS or Glock 19 MOS pistol.