Meprolight Smith & Wesson, TRU-DOT Adjustable Night Sight Set for K, L, N Frame Revolvers

Meprolight Smith & Wesson, TRU-DOT Adjustable Night Sight Set for K, L, N Frame Revolvers

Meprolight Smith & Wesson, TRU-DOT Adjustable Night Sight Set for K, L, N Frame Revolvers

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For Smith & Wesson K, L, and N frame revolvers

Enjoy a clear, sharp sight picture and visible aiming points, regardless of light conditions. MEPROLIGHT TRU-DOT® Tritium night sights are considered the brightest self-illuminated sight available today, appearing up to 20% brighter than other brands. And because the MEPROLIGHT front dot is purposely brighter than the rear dots, your focus is naturally drawn to the front sight and beyond—just where it belongs. With sights installed, low light conditions are no longer a limitation on your weapon. If you can see your target, you can set it squarely in your sights.

MEPROLIGHT shines. Their revolutionary, combat proven, tritium self-illuminated night sights enable you to hit stationary or moving targets under low-light conditions with dramatically increased hit probability. Test results by marksmen and journeymen level shooters using tritium self-illuminated MEPROLIGHT sights have shown an increase of over 85% in hit efficiency, compared to conventional sights. And because TRU-DOT tritium sights add no weight to the weapon system, they require no adjustment by the shooter—except perhaps, to a higher level of success.

Tritium Light Sources:

  • Add no weight
  • Occupy no additional space
  • Function in all weather and temperature conditions
  • Withstand prolonged immersion in commonly used solvents and cleaning compounds

Simply remove the old sight…and replace. Designed as direct replacement parts for the standard weapon sights, MEPROLIGHT illuminated night sights can be mounted easily, with no weapon modifications. Sight retention screw is included.

As tough as the gun it’s mounted on. A unique MV gluing/sealing system holds the light sources securely in their metal sight housing, ensuring impact and shock resistance to withstand the rigors of extensive firing and field handling. MEPROLIGHT sights are completely sealed by a patented bonding process sealed against common hazards like water, dust, and oil; and designed to withstand prolonged immersion in commonly used gun cleaning solvents.

The record speaks for itself. Originally developed to meet the requirements of the Israel Defense Forces, over three million sets of illuminated MEPROLIGHT sights are now in use by military forces on six continents. What’s more, the world's finest firearm manufacturing companies including Kimber, Glock, Benelli, Kahr, Mossberg, H&K, and Remington depend on Meprolight as their source for factory installed night sights.

Quality, first and foremost. Superior production methods and rigid quality control continue to make MEPROLIGHT first choice among defense decision makers. All processes at MEPROLIGHT are performed, controlled, and monitored to demanding levels, including a full quality program certified to ISO-9002 and complying with NATO AQAP-4 and the US Military Specification MIL-I-45208A.

Full support. TRU-DOT sights are backed by the strongest warranty in the business—MEPROLIGHT’S 12-year illumination warranty to the original purchaser. Plus MEPROLIGHT stands ready to support you with their modern design, production, and test facilities…and the most experienced technical staff in the industry. When quality counts, you’re right on target with MEPROLIGHT.


  • ML22770 Adjustable Set for K, L, and N frame revolvers with red insert front set.
  • ML22771 Adjustable Set for K, L, and N frame revolvers with pin-on front set (not meant for use on Mountain Guns).

NOTE: Smith & Wesson offers many varying height front sights. Meprolight only produces the most common height.

Special discounts may apply for high volume sales. Contact our Bids & Quotes department for more information.


by PowerReviews
Meprolight: Smith & Wesson, TRU-DOT Adjustable Night Sight Set for K, L, N Frame Revolvers

(based on 1 review)

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(1 of 1 customers found this review helpful)


Excellent, But Requires Machining

By Glass Darkly

from Shawnee National Forest


  • Rugged


  • Needed machine work

Best Uses

  • Personal Defense

Comments about Meprolight: Smith & Wesson, TRU-DOT Adjustable Night Sight Set for K, L, N Frame Revolvers:

Installing the front sight was as expected - you'll need a 400 grit stone to wear down the back of the sight until it fits the dovetail. Tapping it into position with a layer of Loctite 609 makes it a solid fit that won't shake loose under any conditions.

However, I didn't expect the plunger hole in the adjustment screw head on the rear sight to be too small to fit the plunger. And don't bother purchasing a S&W replacement screw kit because it doesn't have the proper thread count to screw into the rear sight blade - this is a custom thread count for no reason. No, you'll have to carefully drill out the screw head with a 5/64" bit so that the plunger will depress completely into the opening. There's really no excuse delivering a poorly machined part, especially when the issue is the wrong size hole drilled in a screw head.

So, overall I like Meprolight (I've installed these sights on my HK P30L and S&W M&P 9 Pro pistols with excellent results), but the revolver installation is not straight forward. Yet, with the machine work out of the way, my semi-custom S&W 686 with Tru-Dot sights is now my primary home defense weapon.

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