This XS Sights DXT2 Big Dot night sight (part no. SI-0020S-5Y) is a fixed front/rear set built for a Sig P239, with a yellow tritium front for a fast sight picture in any light.

Key Specifications

• Fits a Sig P239.
• Front sight is tritium powered with a yellow high-contrast ring around the glow dot.
• Big Dot front blade measures 0.188 inch for a fast dot-the-i sight picture.
• Rear sight is a low-profile V-notch that keeps the front sight clearly visible.
• Rear sight carries a white outline around a tritium center (the DXT2 configuration).
• Rear sight has a ledge profile that helps with one-handed slide manipulation.
• Both sights are machined from durable CNC-machined steel.
• Backed by a 10-year warranty and a 30-day satisfaction guarantee.
• Designed to fit standard holster options without modification.

Frequently Asked Questions

Does this sight need batteries?

No. The front sight is tritium powered and glows continuously with no battery or light-charging step required.

Will this fit my exact pistol?

It is cut for a Sig P239. XS Sights machines these to each slide’s dovetail, so confirm your exact model and generation before ordering.

Buy the XS Sights DXT2 Big Dot Night Sight for Sig P239 – Yellow

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