I can't seem to find any sort of exploded or cutaway view on these triggers. Can anyone help a guy out? Also are internal parts available?

Nope and nope… I was informed informed no parts are serviced. I do have a brand new one for sale if you are wanting to go from single to 2 stage….

I actually have one already. Was going to adapt it to my Tikka like one of the members on here did, but he did it permanently and I wanted to be able to reverse it.