You guys are right. I just spent almost 30 minutes taking my MKIII apart and putting it back. I used a thin, long screwdriver to push the hammer forward all the way. Once you know where the hammer strut needs to rest on the main spring assembly, you're good. Took me a while, and a few internet searches to get it right!
The manual is not very explicit and its illustrations have little detail.
Anyways, I performend mild cleaning of the bore and insides with some CLP and topped everything off with a very light layer of Rem oil.