Just gonna say this one thing, and then I'll keep my squee silently for the next several weeks.
If if IF Sam Colt builds that gun for Sam, so he can save Dean from something supernatural, I will die happy.
Do you hear me, Sera?
I WILL DIE HAPPY.
(And if they use the names Pancho or Lefty at any point, I'll do it right then and there.)
That is all. :D