It is for a 4D Maglite with a Malkoff XP-G. I’m just spoiled by smooth beams🤪🙈🥴I have a bunch of Mag accessories from kaidomain. What I have learned is that unless you are going to be producing heat that will start to melt the pre cut Malkoff plastic reflectors then stick with the very nice and smooth cut plastic reflector. Is this for a full size Mag? I have had 2 Malkoff drop in prebuilt emitters for big Mags. They have been nothing but incredible. My favorite is the 3-6 D Cell drop in. It is XP-G2 perfection.