The XS Sights DXT2 Big Dot Sight for the Sig 1911 RCS (XS Sights part no. SI-0018S-5Y) in yellow is a tritium-powered front and rear sight set built around XS Sights’ signature Big Dot front, which uses a large, high-contrast glowing dot instead of a traditional narrow post for a faster sight picture under stress. The 0.188-inch front dot absorbs ambient light and glows in low light, while the low-profile V-notch rear sight opens up visibility around the front sight rather than boxing it in. This DXT2 version pairs a tritium front with a tritium-centered rear outline, and the rear sight’s angled ledge supports one-handed slide manipulation if a shooter’s support hand is disabled. It’s a purpose-built self-defense sight upgrade for the Sig 1911 platform.

Key Specifications

• Uses a Big Dot front sight measuring 0.188 inches, built for a faster sight picture than a standard post.
• Powered by tritium in the front sight for a visible glowing dot in low light.
• Rear sight carries a white outline with tritium center, giving a fast three-dot reference in any light.
• Rear sight ledge is cut for one-handed slide manipulation against a belt or holster edge.
• Machined from durable CNC-machined steel for a sight that holds up to slide cycling and holster wear.

Frequently Asked Questions

Does this sight set fit any 1911? This set is cut specifically for the Sig Sauer 1911 RCS pattern; confirm your model’s sight dovetail before ordering.

Is the rear sight also tritium, or just the front? This DXT2 version has a tritium-powered front dot and a tritium center in the rear sight’s white outline, giving a visible reference front and rear in low light.

What does the one-handed ledge on the rear sight do? It’s an angled, catchable edge that lets a shooter rack the slide one-handed against a belt, holster, or boot heel if their support hand is injured or occupied.

Buy the XS Sights DXT2 Big Dot Sight for Sig 1911

A fast, high-visibility sight picture is one of the most practical upgrades you can make to a defensive 1911, and the DXT2 Big Dot set is built for exactly that. Order it from our Lubbock, Texas gun shop for insured shipping right to your door, and browse the rest of our gun sights selection for other 1911 options.