Saw the results Hop got with his SFAR using ya’lls gas block, and it got me to thinking about it for a 308 I run suppressed most of the time.

So, looking through the website, I am trying to figure out all of the different listings for the gasblocks.  

I get the diameter for the GB, but how about all of the other stuff?  

If I buy a GB, does it come with all of the included switches/shoulders?

Eta
Nvrmd.  Watched Hop’s vid, it seemed like all of the shoulders came with the blocks.  The website clarifies.