MPN: GL-0010S-5N / GL-0010S-5P / GL-0010S-5Y


  • Excels in high-stress defensive situations
  • High-contrast color designed for maximum visibility in all light conditions
  • Glow Dot -convex photoluminescent dot absorbs ambient light and glows in low light levels
  • Low profile and snag-free design for comfortable carry and fits in most common holsters
  • Big Dot remains visible under stress when the focus is drawn downrange. Outside diameter 0.188"
  • Dot-the-"i" Sight Picture - Straight line sight picture with differentiated front and rear sight prevents shooters from confusing the front and rear sight
  • Rear Sight Ledge aids in one-handed slide manipulations
  • DXT2 - Tritium in both front and rear sight (GL-0010S-5N, GL-0010S-5P, GL-0010S-5Y)
    • Beta Emitting lamps glow in low light to aid in sight alignment
  • Made in the U.S.A.

XS Glock 21/30 Night Sights


  • Glock 20, 21, 29, 30, 30S, 37, 41 (Gen 1-5)


DXT2 - Tritium in both front and rear sight

  • 1x Tritium Front Sight
  • 1x Front Slight Screw (Installed)
  • 1x Tritium Rear Sight
  • 2x Rear Sight Screws (Installed)
  • 1x Allen Key
  • 1x Glock Front Sight Tool
  • 1x Red Thread Locker


If you’d like to make your Glock 20, 21, 29, 30, 30S, 37 or 41 more serviceable, you will enjoy this XS Systems Defensive Express Gen2 (DXT2) tritium night sight. These sights feature a low-profile, snag-free design and are a snap to install. The tritium insert is surrounded by a white line to permit easy target acquisition during the daylight hours. Alignment with the target quickly becomes second nature after a bit of practice, making the sight suitable for both backup and concealed carry weapons.

The front sight for this Glock night sight features the radioactive hydrogen isotope, tritium. Tritium is known for its ability to glow in the dark when combined with a phosphor. No batteries are required to operate the sight. The lifespan for tritium is measured in half-lives. The half-life for tritium is approximately 12 years, meaning that it will still be at half its original brightness at the end of 12 years.

This Glock tritium sights by XS Sight Systems are sturdy and able to go wherever you take your Glock. The sight will arrive at your home complete with all the tools necessary for installation. You’ll wonder how you ever got along without this tritium sight when you’ve tested it a few times at the range.

About XS Sight Systems

XS Sight Systems is the product of a businessman’s dream to create a company with a heavy focus on customer satisfaction. From its beginning in 1996 to this day, XS Sight Systems continues to provide stellar service worthy of its high-quality products. To purchase an XS product is to purchase excellence.



This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.

“GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither Wing Tactical, LLC nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit

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