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The factory bead on most defensive shotguns is small, dark, and easy to lose against a busy background. XS Sights built the Big Dot Tritium to fix exactly that. It layers a fat white convex dot around a self-illuminating tritium vial, giving you a high-contrast front reference that jumps out in bright sun and glows green when the lights go down. That white ring reflects ambient light and helps cut through color vision issues, while the tritium keeps working in total darkness with no batteries or charging needed.
At 0.188 inches wide, this is one of the largest front sights you can put on a shotgun, and that size is the whole point. A bigger dot means your eye finds it faster, so you can get on target quickly and recover your sight picture after recoil or muzzle flash. The body is CNC-machined from steel bar stock in Texas and finished in matte black, so it holds up to hard use and years of range and field time.
This is a do-it-yourself upgrade. The sight glues over your existing front bead using a two-part epoxy like J-B Weld or Brownells Acraglas, filling the cavity underneath and pressing it down over the bead to cure. It fits beads measuring 0.120 to 0.140 inches in diameter and works on Mossberg, Remington, and other shotguns with a bead mounted directly to the barrel. A conversion bead is included for Mossberg guns whose factory bead doesn't play nice. Take your time on the install, get it centered, and it'll look and shoot like a factory setup.
Keep in mind this is a standalone front sight. It's not meant to pair with rail-mounted optics or ghost ring rear systems, so it's best on a plain-barrel shotgun that runs a simple bead. For a home-defense 870 or a Mossberg 500/590 that lives by the bed, it's one of the simplest upgrades that makes a real difference when you need to aim in a hurry.
It glues directly over your existing front bead using a two-part epoxy such as J-B Weld or Brownells Acraglas. You fill the cavity on the underside of the sight, press it down over the bead, and let it fully cure. Take your time getting it centered and it'll look like a factory sight once it sets.
It's designed for shotguns with a bead mounted directly to the barrel, and the bead needs to measure between 0.120 and 0.140 inches in diameter. It fits many Remington, Mossberg, and similar plain-barrel shotguns. If your bead is too small or too large, you may need to swap in a correctly sized bead before installing, and the Mossberg conversion bead in the package covers some of those cases.
No. The tritium vial is self-illuminating and glows green in low or no light without any batteries or exposure to light beforehand. The white ring around it reflects ambient light during the day, so you get a usable aiming reference around the clock.
No, this is a standalone front sight and isn't meant to pair with rail-mounted optics or ghost ring rear systems. It's built for a plain-barrel shotgun that runs a simple front bead. If you want a full night sight setup with a rear reference, you'd want to look at a different XS system.
| UPC | 647533025768 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SG20033 |
| Color | Green, White Outline |
| Model | |
| Product Type | Tritium Front |
| Style | Tritium Beads |
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