I also tend not to let things "Slam forward" on collectable guns...
Mitchell's manual, like his marketing, takes some liberties and codifies some misconceptions.
Parts of an original DWM manual are visible here:
http://www.landofborchardt.com/english_manual.html
You can download the Century International Arms book here:
http://stevespages.com/pdf/luger_p08.pdf
Always remember that a Luger can be a perfectly functional firearm while disassembled...
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Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.