SureFire M340DF Pro Dual Fuel Mini Scout Weapon Light - 650 Lumens - Black

Manufactured by SureFire
Manufactured by SureFire
2 Reviews

In Stock

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The SureFire M340DF Pro Dual Fuel Mini Scout Weapon Light is a compact, high-performance weapon light that is ideal for medium to long-range applications. It features a dual-fuel design that allows it to run on either an SF18350 rechargeable battery or a single 123A battery. With the SF18350 battery, the light produces 650 lumens of light for 45 minutes, and with the 123A battery, it produces 350 lumens of light for 1 hour.

The M340DF Pro also features a highly focused beam that produces a peak beam intensity of 95,000 candela. This makes it ideal for illuminating targets at long distances. The light is also equipped with an integrated Picatinny/M-LOK mount for easy and secure attachment to your firearm.


  • Dual fuel - Works with SF18350 rechargeable battery or (1) 123A battery
  • 650 Lumens / 95,000 Candela for 45 minutes (with SF18350)
  • 350 Lumens / 55,000 Candela for 1 hour (with 123A)
  • Up to 616m throw (@ 95,000 Candela)
  • Integrated Picatinny/M-LOK mount
  • Virtually indestructible LED and TIR lens
  • Highly focused for medium to long ranges
  • Mil-Spec hardcoat anodized black
  • Aluminum construction
  • O-Ring sealed
  • Z68 Shrouded tailcap switch
  • 1.258" Bezel diameter

The M340DF Pro is constructed from durable aluminum and is O-ring sealed to make it water and dust resistant. It is also Mil-Spec hardcoat anodized for added durability. The light is also equipped with a Z68 shrouded tailcap switch that provides momentary-on and constant-on operation.

Overall, the SureFire M340DF Pro Dual Fuel Mini Scout Weapon Light is a powerful and versatile weapon light that is perfect for a variety of applications. It is ideal for law enforcement, military, and personal defense use.

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Battery LifeLess Than 100 Hours
Battery Type18350 3.6V Li-Ion Rechargeable
FinishHardcoat Anodized
ModesConstant, Momentary, High, White LED
Mount TypeM-LOK / Picatinny
Weight5.11 Oz
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

2 reviews

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Short Take: This is excellent and I recommend it!

I have and/or have used the Modlite PLH V2, OKW, PLH5K, REIN 1.0,2.0, and 3.0.

This mini-scout competes directly in this league. I found the beam to be a cross between the PLH V2 and OKW. The hotspot size is in between the two, but the spill brightness mirrors the PLH V2, nearly. The hotspot intensity is right there with the REIN 3.0, superior to the OKW and PLH V2. This all is achieved at 650 lumens by having a deep, smooth reflector and an overall smaller beam (less spill) by about 20%. This is 35% less area, and keeping in mind that Cloud Defensive and Modlite use "OTF" lumens, while Surefire uses ANSI lumens, as a measurement, explains how 650 lumens can approximate REIN 3.0 performance (with 20% less beam total circumference). I have measured the LUX at 1m to be 105,000, and with a CR123, exactly 55,000, as per the advertised rating by Surefire.

Good light

by -

Great light it is hard to argue with surefire quality. I like the duel fuel battery option. It came with 2 mounting systems mlok and Pic mounts. It will give sight to the blind in the dark.