The SureFire M640DF Scout Light Pro in black (SureFire part no. M640DF-BK-PRO) unites the elements of the M600DF Scout Light with a new Low-Profile Mount. Its ultra-high-output LED delivers 1,200 lumens with 123A batteries or 1,500 lumens with the included SF18650B rechargeable cell. A TIR lens shapes the beam for reach and ample surround light. It is built of lightweight aerospace aluminum, Mil-Spec hard anodized and O-ring sealed, for use from close range to longer distances.

Key Specifications

• Output is 1,500 lumens with the SF18650B, which comes with the light.
• On two 123A lithium batteries the output is 1,200 lumens, for when rechargeables are not on hand.
• Runtime is 1.5 hours on the SF18650B and 1.25 hours on 123A cells, enough for a long session.
• Beam distance is 250 meters on the SF18650B and 220 meters on 123A cells, a rating for reach.
• Peak beam intensity is 16,000 candela on the SF18650B and 12,800 on 123A cells, the measure of beam throw.
• The Low-Profile Mount attaches to any MIL-STD-1913 or M-LOK rail, and mounts for both are included.
• Activation is a Z68 momentary or constant-on pushbutton with a protective shroud.
• The body is aluminum with a Mil-Spec hard-anodized finish, and a tempered window protects the lens.
• Length is 5.56 inches, so it fits along a handguard without crowding the rail.
• Liquid ingress protection is IPX7, the rating for a light that works in wet weather.

Frequently Asked Questions

What batteries does it use and what is the weight? It takes one SF18650B rechargeable cell, which is included, or two 123A lithium batteries, and it weighs 5.5 ounces with batteries.

What rails does it mount to? The Low-Profile Mount attaches to MIL-STD-1913 and M-LOK rails, and mounts for both are included.

Is the 1,500 lumen output available on 123A batteries? No. SureFire specifies the SF18650B for the 1,500 lumen output, the 1.5 hour runtime and the 250 meter beam distance.

Buy the SureFire M640DF Dual Fuel Scout Light Pro, Black, 1,500 Lumens

A light that mounts low and runs on either battery type fits more rifles and more routines than a single-fuel model. Order it from our Lubbock, Texas gun shop for fast shipping, and add it to your weapon lights lineup.