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Questions & Answers
Does it come with a pressure switch Expert Answer

The SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light does not include a pressure switch. However, it is compatible with SureFire switches like the SR07 which can be found by using the link below:
https://www.opticsplanet.com/surefire-dual-tail-cap-assembly-for-m6xx-scoutlight.html

by Ethan, Gear Expert, May 1, 2024
Hi, does it come with a ue tail cap? Expert Answer

The SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light includes the SureFire Z68 click-style tailcap.

by Ethan, Gear Expert, April 17, 2024
Customer Reviews
Helpful Positive Review Surefire 640 by dnttech, Verified Owner, July 7, 2024
I own 4 Surefire 600's so I was interested in how well the 640 would compare. Since the light was going on a CQB rifle I wanted a nice output and something which could light up an entire room without any overpowering white spots. For CQB, she's per...
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2/2 found this helpful
Helpful Positive Review SureFire review by Chad Hankins, Verified Owner, November 28, 2023
The only reason it doesn't get 5 stars is price. I have purchased 5 or 6 lights from different mfg's. This one is the best as far as function. Probably the worst as far as value. In my opinion, for this price you should get the pressure pad and opti...
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3/3 found this helpful
Helpful Positive Review Worth the Money by Nobody Uknow, October 17, 2020
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 furt...
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16/16 found this helpful
Helpful Positive Review surefire..... by witchdoctor, Verified Owner, August 2, 2024
I mean first and foremost its surefire!!! Great quality and awesome performance You definitely pay more for the quality and name definitely backs the product. I use this for competition and never failed me. I use this with the rechargeable cr123 and...
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1/1 found this helpful
Helpful Positive Review i like the light, not so sure about the mount. by McChaz, Verified Owner, August 31, 2024
.My first M6xx had a dedicated picatinny mount with a large knib for mounting. This one requires a screw driver, but will also do M Loc. Nit sure if Im crazy about the new mount. Time will tell. The ligh5 is great.
1/1 found this helpful
Helpful Positive Review bright and solid reliable weapon light. by abcdefghijklmnop, May 19, 2022
Surefire holds up to its name this light is great. Its solid flexible and very reliable. The M640DF allows you to use the rechargeable 18650 battery or the cr123 batteries. It comes with the allen key and an mlok attachment. It was super easy to swit...
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3/3 found this helpful
Read All 54 Reviews
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Product Info for SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light

Quickly locate targets in low-light environments with a SureFire M640DF Dual Fuel Scout Light Pro 1500 Lumen LED Weapon Light. These Rifle Weapon Lights by SureFire feature a low-profile mount (LPM) that easily attaches to your weapon with as little bulk as possible. The SureFire Scout Light Pro Dual Fuel 1500 Lumen Aluminum Rifle Light is built with a total internal reflection (TIR) lens that forms a versatile beam with a sufficient reach, envelops light for close-to long-run activities and improves the lumens with no glare in the objective area. Pick up the SureFire Scout Light Pro Dual Fuel Picatinny Mount Weapon Light to experience the pinnacle of tactical illumination.image

WARNING: California`s Proposition 65

Specifications for SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light:

Manufacturer: SureFire
Light Output: 1200 - 1500 lumens
Bulb Type: LED
Battery Type: 18650
Beam Color: White
Gun Model: Universal
Diameter: 1.125 in
Length: 5.56 in
Weight: 5.5 oz
Bezel Diameter: 1.125 in
Battery Life: 1.25 - 1.5 hours
Weather Resistance: Waterproof
Finish: Mil-spec Hard Anodized
Battery Quantity: 1
Condition: New
Gun Type: Rifle
Mount Type: M-LOK
Fabric/Material: Aluminum
Attachment Type: Picatinny

Features of SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light

  • Dual fuel light can be powered by an SF18650B lithium-ion rechargeable battery or two 123A lithium batteries
  • Generates up to 1,500 lumens of TIR-focused light with included SF18650B or 1,200 lumens with 123A batteries
  • Versatile Low-Profile Mount (LPM) allows the user to optimize the lights position relative to the rail
  • Virtually indestructible ultra-high-output LED
  • TIR lens shapes versatile beam with enough reach and surround light for close-to longer-range operations
  • Mil-Spec hard-anodized aluminum body and tempered window make it light rugged, durable and combat ready
  • O-ring seals keep out moisture
  • Activation via Z68 momentary/constant-on pushbutton switching with protective shroud

Package Contents:

  • SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light

SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light Orderable Models

List of Orderable Models

SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light, Black, M640DF-BK-PRO , MPN: M640DF-BK-PRO , UPC: 084871329262 , Code: FS-FLW-SL3-M640DF-BK-PRO
SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light, Tan, M640DF-TN-PRO , MPN: M640DF-TN-PRO , UPC: 084871329279 , Code: FS-FLW-SL3-M640DF-TN-PRO

SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light Unavailable & Discontinued Models

List of Unorderable Models

USED SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light, Black, M640DF-BK-PRO, EDEMO4, Used, Condition Fair , MPN: M640DF-BK-PRO-EDEMO4 , Code: FS-FLW-SL3-M640DF-BK-PRO-EDEMO4
DEMO, SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light, 18650 Rechargeable Lithium CR123A, White, 1200-1500 Lumens, Black, M640DF-BK-PRO , MPN: M640DF-BK-PRO-DEMO , Code: FS-FLW-SL3-M640DF-BK-PRO-DEMO
DEMO, SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light, 18650 Rechargeable Lithium CR123A, White, 1200-1500 Lumens, Tan, M640DF-TN-PRO , MPN: M640DF-TN-PRO-DEMO , Code: FS-FLW-SL3-M640DF-TN-PRO-DEMO
USED SureFire M640DF Scout Light Pro Dual Fuel LED Weapon Light, Tan, M640DF-TN-PRO, EDEMO4, Used, Condition Fair , MPN: M640DF-TN-PRO-EDEMO4 , Code: FS-FLW-SL3-M640DF-TN-PRO-EDEMO4

Proposition 65 Warning for California Consumers

For more information go to www.p65warnings.ca.gov

Notification

WARNING: This product can expose you to N,N-Dimethylacetamide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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