This light head is a direct replacement for the Surefire M600DF head. It can be used with the Modlite 18650 body or the smaller Modlite 18350 body. It will NOT fit M300 sized bodies. Lumen output is 680 lumens and the throw is about 400% greater than the M600DF. This light head is best suited for situations where extreme throw is needed.
2x Lithium CR123 cells are only supported with this light head. This head will not function on a single CR123 and will not function on legacy scout bodies.