XS Sights Big Dot Tritium Front Sight for S&W J Frame & Ruger SP101 - Green Tritium Yellow Outline

The XS Sights Big Dot Revolver Front Sight is a defensive tritium night sight purpose-built for Smith & Wesson J Frame and Ruger SP101 revolvers. Designed for fast front-sight acquisition in every lighting condition, this front-only replacement pairs a glowing tritium lamp with XS's photoluminescent Glow Dot and a high-contrast yellow outline ring, so the eye locks onto the front sight the instant the gun comes on target.

The sight body is CNC-machined from steel and finished in a low-glare black coating for snag-free everyday carry. It mounts as a pin-hole front sight - the existing factory blade is removed, a pin hole is drilled into the sight rib, and the new sight is pressed in. The factory rear sight is retained, making this an upgrade focused purely on a faster, more intuitive defensive sight picture. XS builds these sights for the close-quarters, instinct-driven shooting that defines a J-frame or SP101 carry gun.

The green tritium vial glows continuously without batteries or switches, while the surrounding yellow outline frames the dot for rapid daylight pickup. Whether the revolver is carried concealed or kept bedside as a home-defense handgun, the Big Dot puts the front sight where the eye naturally finds it under stress. Front sight only - the factory rear sight is used as-is.