I should put that Rainmaker back together. It was half taken apart, along with a second one, and both strapped to the front cargo rack of an ATV and wired to a switch on the handlebars. That was a really, really fun scenario game.
No one as guessed picture number 2 yet. That's a Sheridan P12 (just like a PMI-1 DF, with a longer barrel) with a Sergison Machine K Frame. Yes, the frame cost me more than the gun did.
Now the second to last picture...
It was (big stress on "was") a Stingray. Built by Jeff Wilkins many years ago, it was a true work of art. To quote him...
"Here in brief is how I built my Stingray. First I made some scale drawings of my stock Stingrays internals, and I recorded all their dimensions. Over these drawings I drew various body designs until I decided on one. Then came late nights and long weekends in front of a milling machine and lathe, machining blocks of billet aluminum into the two body halves, trigger frame, expansion chamber, and its mounting block. I then made an aluminum sleeve to go over the factory barrel, and welded them together. Then I machined a new hammer tube out of brass and a new aluminum end cap for it.Then using jeweler's rouge and a polishing pad mounted to an electric drill I polished all to a mirror finish."
The good old Stingray trigger components in an aluminum frame.
Some familiar Stingray internals.