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Big Dot Shotgun Bead - Plain Barrel - Mossberg

4 reviews Write a Review
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Big Dot and Standard Dot Night Sights are defensive tritium sights designed to enhance your defense gun. The sights use 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. Designed to be large and highly visible, these sights help 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, while green is an excellent option for low light and has a very bright glow intensity. XS Tritium Night sights are big, bright, and easy to see day or night!

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 instructions, a 30-Day Satisfaction Guarantee, and stand behind a 10-Year No Questions Asked Warranty on all our sights. If you break your sight training, we want to hear about it. If you damage your sight installing it, give us a call, and we will get a new one mailed out after a friendly lecture from one of our gunsmiths. 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!) Either way, our products are built to take a beating, and we have your back if anything happens.

  • Tritium powered front sight 
  • Big Dot front measures 0.188"
  • Standard Dot front measures 0.140"
  • High-contrast colored front sight 
  • Glow dot absorbs ambient light and glows in low light
  • Durable CNC machined steel 
  • 10 Year Warranty 
  • 30 Day Satisfaction Guarantee

Glues over front bead. Bead must be 0.120”-0.140” in diameter. Suggest Brownells #6 or #26 bead if factory is not of correct size. May require opening up bead hole to larger size by drilling & tapping. Mossberg factory bead with hex base must be replaced. The kit comes with a conversion bead for Mossberg shotguns.

Epoxy Over Existing #6 Bead. View Written Installation Instructions.


WARNING-Cancer and Reproductive Harm –

This XS Sights product is protected by our No Questions Asked Warranty. We will replace the product if it becomes damaged in any way or if the tritium stops glowing prior to 10 years. 30-Day Satisfaction Guarantee: Try a new set of night sights risk free for 30 days. If you are dissatisfied with your purchase you can 1. Exchange the sights for a different available option 2. Return the product to the point of purchase for a refund. Sights that have been installed and test fired qualify for this program. Products must be purchased through XSSIGHTS.COM or a participating dealer partner. All dissatisfied products must be returned. Sight installation fees incurred are not subject for refund. Return shipping is payed by the customer. For assistance email or call (888) 744-4880.

4 Reviews

  • 5
    Excellent upgrade

    Posted by Hammer on Apr 9th 2022

    If your shotgun came with a simple brass bead sight, this is one of the best upgrades you can make to your shotgun, imo. Much larger and highly visible both day and night in a variety of conditions. Easy installation. Just do it.

  • 5
    Mossberg big dor

    Posted by William Glaser Jr. on Apr 7th 2022

    I ordered the white big dot front sight for the mossberg 500. It cowitness’s nicely with the aridus crom holosun mount that uses an xs rear sight. Great product easy to install.

  • 5
    Great system

    Posted by Lee671 on Feb 11th 2022

    Easy install. Fantastic sight picture. Third shotgun to get an XS sight. So much better than factory beads.

  • 5
    Fantastic upgrades in visibility, accuracy, and precision to your shotgun

    Posted by Jon on Dec 13th 2021

    My Mossbergs came with a bead sight that was barely visible in the daytime, and certainly not usable in the nighttime, even with a mounted flashlight. I have had previous experience using a Fiber Optic snap on sight, but it was noticeably less durable than a built in fixed option. After a lot of research, everyone pointed me to XS Sights. Instructions and videos are all available, and installation was easy. The dot is basically bombproof when installed with JB weld. I've tried both the Tritium and Non-Tritium version, and I personally like the Tritium for dusk/dawn/twilight environments, but it's not a requirement, the basic big dot is usable as well. It draws your eye in quite well and helps in getting a good consistent cheek weld. This would be my recommendation if you don't want to install a rail+rear and front sight on your shotgun (XS makes that option as well).

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