I picked up an Surefire F05 Filter a couple weeks ago for my E2E light. I also carry a AA Mini-Mag (have for years). I have a filter kit for my AA Mag, but it looks like I can consolidate and only need to carry one type of filter. Turns out the Surefire filters work great with Mags. I'm getting a blue filter next. I'm thinking about going one each. It'll be easier than having to carry a case of filter lenses around inmy pocket, that's for sure. 