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DXT2 Big Dot Night Sights - HK

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Don't Struggle to See Your Front Sight!

DXT2 Night Sights are defensive tritium sights designed to enhance your EDC pistol. The front sight uses a proprietary photoluminescent Glow Dot that absorbs ambient light and glows in low light. The convex dot's additional surface area increases light absorption, intensifying the charge of the Glow Dot. We designed the DXT2 sights to be large and highly visible; this helps solve many issues, from aging eyes to deteriorating vision. We've found that the orange front tends to be most visible in daylight settings and that yellow glows brighter in low light. The shallow V rear has a simple, low profile that provides a wide field of view. The dot-the "i" sight picture, with a tritium dot in the front and a tritium bar in the rear, prevent confusing the front and rear sight in high-stress situations. In most gunfights, the victim and attacker are moving, and the victim is threat-focused. DXT2 Night sights are big, bright, and easy to see day or night!

XS DXT2 Tritium Night Sights are excellent defensive sight options for your pistol that will keep your front sight visible day or night. That way, you'll be ready for the fight, no matter the light.

The express sight concept started it all for us over 25 years ago. Our founders wanted to engineer a sighting system primed for defensive situations that was big and easy to see. Modeled after African big game hunting sights, express sights are designed to give you a visible, and combat accurate flash sight picture when seconds count.  

The sights are CNC machined from solid steel bar stock by our in-house machine shop. We design, machine, and insert our tritium to produce the highest quality possible and provide American Made products.

We are a small, second-generation family-owned business based in Fort Worth, TX, and our customers are family. We live, eat, and breathe guns. We offer easy DIY install instructions and a 30-Day Satisfaction Guarantee. If you have color vision issues and can't see the front dot, call us, and we will get another color shipped out - over 5% of the population has color blindness to a degree! 

  • Tritium powered front and rear sight
  • Big Dot front measures 0.188"
  • High-contrast colored front sight 
  • Glow dot absorbs ambient light and glows in low light
  • Low-profile V rear provides greater visibility of front sight
  • Simple dot-the-"i" sight picture
  • Rear sight white outline with tritium center
  • Rear sight ledge for one-handed slide manipulations
  • Durable CNC machined steel 
  • 12 year warranty on tritium
  • 30 Day Satisfaction Guarantee
  • Fits standard holster options

XS DXT2 sights are easily installable by using a hammer and punch.

View Written Installation Instuctions.


Prop 65 warning WARNING: This product can expose you to lead, which is known to the State of California to cause cancer and birth defects or reproductive harm. (For more information go to

Tritium Products — XS Sights warrants all handgun sights containing tritium to be free from defects in material and workmanship. Tritium illumination is warranted to glow for twelve (12) years. This warranty applies only to the original purchaser. Proof of purchase is required for an RMA. If this product is found to be defective, the manufacturer's only obligation is to replace the product at the manufacturer's discretion, provided that the product has not been damaged through misuse, modifications, neglect, or mishandling. XS Sights will not be responsible for product removal or installation labor costs. — Tritium illumination will dim throughout the product's life and is not subject to warranty claims. This warranty shall not apply to the finish on any portion of the product or weathering, as this is considered normal wear and tear. Sights improperly installed are not subject to warranty. — XS Sights only warrants products sold through authorized resellers. — All international sales are final and do not qualify for this warranty policy. Some authorized international resellers carry common warranty items to provide for their customers. For more information, please see our International Shipping Policy.

6 Reviews

  • 5
    Best Sights Available

    Posted by Tyler Morarie on Aug 12th 2022

    Love xs sights. Each handgun I carry has xs big dots. Nothing is faster or more visible. These are awesome

  • 5
    Big Dot Night Sights

    Posted by Steve on Jul 20th 2022

    I ordered the Big Dot sights for my pistol, and had them installed. They worked great...for about 3 days. The big front sight glowed well the 1st night, dimmer the 2nd and dead the 3rd night. I contacted XS about the problem and they shipped a replacement sight out that same day. I replaced it with the new sight and weeks later it is still glowing bright. The sights and their customer service are both top notch.

  • 5
    HK VP40

    Posted by Ted Smyers CPO (SW/SS) USN on Jul 6th 2022

    DXT2 (Yellow) installed by my professional Gunsmith. These are the perfect night sights combination for my VP40. Absolutely Awesome. This is a must do for any HK weapon. Highly recommend, bar none.

  • 5
    HK VP40

    Posted by CPO (SW/SS) USN on Jun 18th 2022

    Outstanding Customer Service, prefect fit, on my HK VP40. Exactly what I needed to upgrade my EDC.

  • 5
    DXT2 Sights

    Posted by Kevin Miller on Mar 20th 2022

    This sights are perfect for my nightstand pistol. Quick acquisition and nice and bright.

  • 3
    DXT2 Big dot for H&K USP

    Posted by Mike on Jan 12th 2022

    The front sight is perfect, the fit, the view and easy to put on target faster, the rear did not fit my gun. the dove tail was angled different, and the glow stick sat below the bridge, and you can only see the top end so i pulled it off and put the original back on and only use the front. The big dot on the front of the gun makes it very easy to see even when you look through the sight like i do when shooting. over they work on the front but not on the back it needs improvement on the dove tail and on the height.