SureFire KE2-T Turbo Head: Which Scout Lights It Fits

The SureFire KE2-T is a replacement head that converts a non-Dual Fuel M600U or M640U Scout Light into a Turbo, throw-first light. SureFire's product page calls it a "candela power upgrade for M600U/M640U Scout Light models" and the genuine replacement head for the M640T Turbo Scout Light Pro. You keep the body, tailcap, switch, and mount you already own and unscrew the old bezel.

The selling point is candela, not lumens. SureFire rates the KE2-T at 700 lumens and 70,000 candela, with the turbo reflector concentrating output into a tight beam for identification farther downrange. The Firearm Blog's October 30 coverage put it plainly: the head trades flood for throw. On a carbine that lives indoors, that tight hotspot gives less peripheral spill than a flood head; on a rural property or patrol rifle where targets sit past 50 yards, it is the better beam.

The KE2-T fits non-Dual Fuel M600U and M640U Scout Lights and the M640T, and it does not fit any Dual Fuel body. That last exclusion is the trap. Dual Fuel Scout Lights, such as the M640DF Scout Light Pro, take a different head (SureFire's KE2-DF), so a KE2-T ordered for an M640DF will not work.

• Fits: non-Dual Fuel M600U Scout Light (two 123A cells).
• Fits: non-Dual Fuel M640U Scout Light Pro (two 123A cells).
• Fits: M640T Turbo Scout Light Pro, as the factory replacement head.
• Does not fit: any Dual Fuel body, including the M640DF Scout Light Pro. Use the KE2-DF head, or buy the complete M640DFT-PRO.

If your light runs an 18650 cell, it is a Dual Fuel body and the KE2-T is the wrong part. SureFire's compatibility statement stops at M600U, M640U, and M640T, so treat older or discontinued Scout bodies as unconfirmed until SureFire lists them.

SureFire lists the KE2-T at 700 lumens, 70,000 candela, a 529-meter beam, and 1.5 hours of runtime on two 123A batteries (not included). The head is aluminum with a Mil-Spec hard anodized finish and a tempered window, measures 1.9 inches long with a 1.125-inch bezel, and weighs 1.8 ounces. These are manufacturer ratings, not bench measurements.

SureFire offers the KE2-T in black (KE2-T-BK, UPC 084871334273) and tan (KE2-T-TN, UPC 084871334495). SureFire also lists the KE2-B as its standard M600-series and M640U replacement head.

If you own a Dual Fuel Scout Light or no Scout Light at all, the complete SureFire M640DFT-PRO Turbo Scout Light Pro ($334.49) gives you the Turbo beam on the Dual Fuel platform. SureFire rates it at 700 lumens and 100,000 candela on an SF18650B cell, more candela than the KE2-T on two 123A cells. For flood-first indoor work, the M640DF Scout Light Pro ($319.99) is the 1,500-lumen option.

Our best AR-15 weapon lights guide compares the Scout lineup with the other top rifle lights, and the Streamlight vs Cloud Defensive vs SureFire comparison covers the throw-versus-flood tradeoff by brand. If weight is the priority, see the lightest rifle weapon lights. To check handguard and mount fit before you buy, drop a light into the rifle builder.