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SureFire
Overview
The SureFire M640DF Scout Light Pro is a powerful weapon light designed to deliver an impressive 1500 lumens of illumination, making it ideal for low-light conditions. It can be powered by either two CR123A 3V Lithium batteries or a single 18650 3.6V Li-Ion rechargeable battery, providing flexibility depending on your needs. This light mounts securely to M-LOK or Picatinny rail systems, ensuring stability on your firearm. This product is commonly found on builds featuring a mid-length gas system and chambered in 5.56 NATO, making it a popular choice for tactical setups.
SureFire M640DF Scout Light PRO Dual Fuel Weapon Light - 1500 Lumens - Black
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SureFire M640DF Scout Light PRO Dual Fuel Weapon Light - 1500 Lumens - Black was the fifth most added weapon light on GunPartPicker in October 2026, behind the Streamlight TLR-1 HL Rail Mount Weapon Light - Dual Remote KIT - 1000 Lumen - Black, with about 6% of all weapon lights added to builds. Up from #9 in September. Builds with this weapon light are mostly chambered in 5.56 NATO (89%), mostly on mid-length gas (74%, then carbine-length 21%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 8 of the 9 retailers we track have it in stock. Buying today, the lowest price is $319.99 at Optics Planet, above October's low of $268.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
We ranked every light by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Weapon Light Guide →The part most often added in each category by hundreds of builds that include this one
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EOTECH EXPS3-0 Holographic Weapon Sight
LMT Upper Receiver Assembly - AR-15 - M4 - Black Anodize
Arisaka Defense Vertical Grip M-LOK
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the SureFire M640DF Scout Light Pro Dual Fuel Weapon Light - 1500 Lumens - Black
| Build | Parts | Total |
|---|---|---|
| My future build | 12 | $2865.27 |
| Mr future build | 12 | $2865.27 |
| Build 1 | 12 | $4636.82 |
 | 11 | $4004.39 |
 | 17 | $1466.38 |
 | 24 | $6505.85 |
 | 26 | $4048.17 |
 | 27 | $5367.99 |
 | 21 | $3081.80 |
 | 17 | $4149.93 |
1 global rating
Top reviews
Surefire M640DF Scout Light Pro dual fuel at 1500 lumens runs on CR123 or rechargeable cells. The dual fuel flexibility is great for varied deployments. T-slot mount keeps it stable. 1500 lumens lights up a 100 yard target easily.
