What is the Bezel/Head on a Surefire M6 called?

[ConfederateScott]

I just ordered a new SF M6 with the deep crenulated head. I am likely going to sell the head and put my KL6 head on the M6 body. But I have been unable to find what to call the M6 head. Does it have a model number? Is it considered a Turbohead with a model number? Whats it worth? Don't get me wrong. I'm not on this forum trying to sell it, I know better than that, heck, I don't even have it yet. I am just trying to get some information on it. Anyone give me the scoop?

 

[flash_bang]

I'm pretty sure it doesn't have a Z number or anything, but most people refer to it as a crenelated KT4. KT4 is actually the name of the upgrade kit for turboheads of the M-series, but it gets the point across.

HAGO,
Flash