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Reviews & Ratings for SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light — 56 reviews

(56 reviews)
SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light
SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light
$369.00 Add to Cart for Your Special Price
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Most Helpful Positive Review Worth the Money
The M640DF Dual Fuel Scout Light Pro 1500 Lumen LED Weapon Light is worth the money. The new mounts in both picatinny and m-lok allow you to position the body of the light at variable distances from the weapon. That's handy if you need to get it further out to clear a suppressor, or you need to get ...
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Most Helpful Negative Review dissappointing
The light I received flickers and dims when shooting and cycling my rifle with the cr123 batteries installed. And comparing the performance of this top shelf product from surefire to the competition, the only good thing about this light is the footprint. Get the modlite or arisaka you will be much b...
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Quality item

by KM, Verified Owner from MA, United States Written on July 12, 2025
So far it feels quality. You can easily purchase grey market copies, but I wanted to buy the real thing to understand the draw of this brand. Everything about it feels precise and clean. Can't wait to bang it around and see how it holds up.
Pros:
  • Warranty. Can't mail a clone back to China
Cons:
  • You'll pay for the genuine article
Best Used for:
  • Home Defense
  • night shooting
Would recommend: Yes
Was it helpful to you? Yes | No
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excellent weapon light

by Mike, Verified Owner from VA, United States Written on June 1, 2025
Great light with multiple mounting options. The rechargeable battery is awesome
Would recommend: Yes
Was it helpful to you? Yes | No
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Bright Flood light

by Mitchell R, Verified Owner from FL, United States Written on February 25, 2025
This torch is perfect for an SBR. I have mine mounted to a ps90 SBR, it looks and preforms great!
Would recommend: Yes
Was it helpful to you? Yes | No
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You probably need one.

by Jack, Verified Owner from AZ, United States Written on February 16, 2025
It’s great. Powerful. If this is for home defense you need one. Secures tightly and it’s from a well tested name.
Would recommend: Yes
Was it helpful to you? Yes | No
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Great Weapon Light

by Average Joe, Verified Owner from NM, United States Written on December 18, 2024
Best weapon light on the market, easy to install and very bright. Would definitely buy another in the future.
Would recommend: Yes
Was it helpful to you? Yes | No
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Great Illumination for the Size

by Stix, Verified Owner from VA, United States Written on December 13, 2024
This thing is bright. No issues nor complaints. What I expect out of SureFire.
Would recommend: Yes
Was it helpful to you? Yes | No
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Surefire Scout Light

by Dan, Verified Owner from PA, United States Written on November 29, 2024
Definitely an upgrade from my streamlight model and also my mini scout. No issues so far, great product from Streamlight as always
Pros:
  • Durability
  • Brightness
  • Ease Of Use
Cons:
  • None
Best Used for:
  • Home Defense
  • duty
  • Training
Would recommend: Yes
Was it helpful to you? Yes | No
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My Supplier

by Dean Adams, Verified Owner from MI, United States Written on November 24, 2024
Optics planet selection and check out is crazy good. They got my business.
Would recommend: Yes
Was it helpful to you? Yes | No
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Surefire Club

by PaidUp, Verified Owner from NY, United States Written on October 20, 2024
As expected. Quality build and functionality. MLOK mount is great! Buy right, Buy Once!
Would recommend: Yes
Was it helpful to you? Yes | No
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Great Premium Light

by Aaron., Verified Owner from OH, United States Written on October 1, 2024
What to say that already has not been said, it is a Surefire scout 640 pro. It works as advertised, I have not changed out the end cap for a pressure switch, which may still cause some flickering issues. But with the factory endcap, I do not have this issue. It is brighter than any of my other lights by far, and it mounts securly with the provided hardware. If you have the $$$ it is a solid option.
Would recommend: Yes
Was it helpful to you? Yes | No
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