Description
Getting a clean sight picture on a revolver in low light has always been the tricky part, and this is where Meprolight's Tru-Dot set earns its keep. It replaces the factory sights on Smith & Wesson K, L, and N frame revolvers that run a pinned front sight and a fully adjustable rear, giving you three green tritium dots that line up horizontally for quick, instinctive aiming. Day or night, the reference stays the same, so there's no mental switch between a daylight picture and a nighttime one.
What the Tru-Dot Set Brings to Your S&W Revolver
The tritium is self-illuminated, meaning no batteries and no switches to remember. The dots simply glow whenever the light drops, and Meprolight builds these to handle stout recoil, rough field conditions, and the solvents that come with regular cleaning. The set is machined from steel with a matte finish, so it keeps that traditional, serviceable revolver profile while adding real low-light capability. Meprolight's tritium runs bright, with the company guaranteeing illuminance for 12 years, and the front dot is tuned to read slightly brighter than the rear to naturally pull your eye where it belongs.
Adjustable Rear, Pinned Front
The rear sight gives you full windage and elevation adjustment, which is what makes this a proper zeroing tool. You can compensate for different bullet weights and distances and settle your point of impact right where you want it. The front is a pinned insert, not a dovetail or DX-style unit, so double-check that your revolver runs a pin-on front before ordering. Worth noting: this particular set is not intended for the S&W Mountain Guns.
Built on a Reputation
Meprolight has been the tritium standard for decades and supplies sights to military and law enforcement users around the world. These install directly in place of the factory sights with minimal fitting, so most owners can swap them without a major gunsmithing project. If you carry or keep a K, L, or N frame for defensive work, this is one of the more meaningful upgrades you can make to it.
Key Specifications
- Manufacturer: Meprolight
- Model: Tru-Dot
- Manufacturer Part Number: 0227713101
- UPC: 840103136714
- Fit: Smith & Wesson K, L, N Frame Revolvers (pinned front sight)
- Sight Type: Tritium Night Sight Set (front and rear)
- Front Sight: Pinned insert, green tritium
- Rear Sight: Fully adjustable (windage and elevation), green tritium
- Dot Color: Green / Green
- Construction: Steel
- Finish: Matte
- Illumination: Self-illuminated tritium, no batteries
- Tritium Warranty: 12 years guaranteed illuminance
- Style: Adjustable
What’s Included
- Green tritium front sight (pinned insert)
- Green tritium fully adjustable rear sight
Frequently Asked Questions
Will the Tru-Dot set fit my Smith & Wesson revolver?
It's made for S&W K, L, and N frame revolvers that use a pinned front sight and a fully adjustable rear. Before ordering, confirm your revolver has a pin-on front insert rather than a dovetail or DX-style front. This specific set is also not intended for use on the S&W Mountain Guns.
Do these Meprolight night sights need batteries?
No. The Tru-Dot dots are self-illuminated by tritium, so there are no batteries, switches, or charging involved. They glow on their own in low light and are always ready, and Meprolight guarantees the tritium illuminance for 12 years.
Can I adjust point of impact with this sight set?
Yes. The rear sight offers full windage and elevation adjustment, which lets you zero for different loads, bullet weights, and distances. The pinned front sight is fixed and is not adjustable.
Is this hard to install on my revolver?
These are designed as a direct replacement for the factory sights and mount in their place with minimal fitting. Many owners handle the swap at home, though if you're not comfortable with the pinned front sight work, a gunsmith can knock it out quickly.





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