looks like xr-e led so older.
seems to thread on at the top of tube but no luck unscrewing.broke one of my strap wrenches and then tore my hands up a bit on the course knurling and sharp edges.
could feel the body tube flex too.thats some real good loctite.stopped before i trashed it or dna tagged it.
looks like it gets a custom spacer set and an 18650 for now.
I still have some of these new in the package and yes they do not come apart.
Some day….
in another thread it was posted that heat was the key to defeating the threadlocker.