I didn't make it!
There whas a earlier report about this: http://forums.filefront.com/fh-bug-reporting/345830-luger-p08-can-fire-before-reload-animation-over.html Some kits still fire the Luger when loading. It are the pick-up kits with only a Luger.
Good find! I can confirm this and it will be reported to the devs.
I am surprised this slipped by since other weapons used to suffer from this bug and were fixed and it was even reported before (as you have shown in the link you provided to the other thread).