Found it! >> Activefire AA light..

[ghostguy6]

I wonder if it's an older, discontinued light, like a Fenix E12 V1?? 🤔

In one of his older videos he does specifically mention carrying a Fenix E11 (V1)

 

[Schuey2002]

In this video (from 10 years ago), Adam mentions owning a bunch of flashlights. He has even talked about the "shelf of flashlights" there in his Shop. So, I wouldn't be surprised if he owns both lights..

 

[Monocrom]

Adam absolutely loves lights with metal tailcap switches since he seems to wear out rubber boots as though he's eating them.