The three position comes with a trigger and the safety. The two position is the little drop-in device that sits in the upper and interfaces with the trigger. No other parts. You can purchase one to use with a mil spec or several other triggers including Geissele SSA series. On his page, it'll be the "redacted" trigger as Geissele sent them a cease and desist on using their name on his page or in association with his product. So every time you see "redacted" on his page, that's code for works with Geissele, LOL.
I have the Geissele "redacted" version which works with SSA and SSA-E from my testing. Thing is, it does remove feel from the trigger so even though you have a Geissele in there, it doesn't feel like it. Yes, it's still FAR better than anything else I've tried. We'll see how the Atrius and the AS Designs do. The Atrius requires a mil spec trigger but the AS Designs seems to work with a broader array of triggers and you can see a full list
HERE. The Geissele does need a "cut" to work. I'll test out one before purchasing more.
A few pics of the Arizona Regulator. I call it the "nugget".
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