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Big Dot Revolver Front Sight - Smith & Wesson

8 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 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 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 
  • 12 year warranty on tritium
  • 30 Day Satisfaction Guarantee

S&W J Frame (Fixed Rear): Pin Hole Must Be Drilled. View Written Installation Instructions.

S&W J Frame Integral Front (fixed rear): Installation for the J-Frame with an integral front requires a gunsmith to mill away most of the existing front sight ramp. Any two-part epoxy, like JB Weld, then affixes the Big Dot onto the existing stub. View Written Installation Instructions.

S&W Bodyguard 38: Installation requires drilling hole(s) in sight, might require filing to fit sight to frame. View Written Installation Instructions.


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.

8 Reviews

  • 5
    Yellow Big Dot on Model 360

    Posted by Caribou60 on May 30th 2023

    Fitted my new yellow, big dot front sight on my S&W model 360 over the weekend. Had basically no issues, except I snapped one drill bit, I'd bought a dozen 1/16" bits and a package of 1/16" Stainless Steel roll pins on amazon before I started so I'd be prepared. I was a little concerned that the new sight wouldn't cover the entire sight channel, but that wasn't an issue on my gun either. Personally, I couldn't be more pleased, it looks and works great. This is the perfect front sight for a j-frame!

  • 5
    bigdot front sight for j frame

    Posted by Unknown on Mar 17th 2023

    great sight for 80 year old eyes

  • 5
    Big Dot on a 342 titanium

    Posted by Mike Carso on Oct 16th 2022

    Retired LEO in February of this year decided to make my 352 my primary carry Got the white big dot setup unbelievable the sight picture it give I would highly recommend this site for any pinned barrel j frame

  • 5
    Big Dot S&W revolver front sight

    Posted by Bill on Sep 15th 2022

    I love your BIG DOT front sights. I run them on four of my revolvers and three 1911's. With old eyes, I can still see the front sights. They are a great help. THANKS !!

  • 5

    Posted by Jim Henderson on Aug 25th 2022

    I put a white BIG DOT front sight on my S&W 360 retirement gun. The sight is simply fantastic! I’ve got glaucoma and cataracts started in my retired cop eyes and the one sight i can ONLY really pick up is my BIG DOT XS Sight. I’m extremely impressed and highly recommend this site.

  • 5
    Big improvement

    Posted by Alan Speer on Mar 23rd 2022

    I am able to get on target faster and can keep both eyes open better.

  • 5
    Big Dot on S&W 340PD

    Posted by RICHARD on Feb 2nd 2022

    Installed very easily in 15 minutes with #54 cobalt drill bit and 1/6 x 1/4 roll pin. Was concerned that the big dot would overwhelm the little J frame, but it worked out well. Either big dot or regular dot will more than satisfy most shooters.

  • 5
    I really like the sight

    Posted by Alan Speer on Jan 12th 2022

    It was a big improvement, and I would recommend it.