Hey all,
I am the proud owner of a 5906 as of this week, and was looking at the pistol in detail and comparing it to my 659. Lots of nice improvements.

One thing that surprised me, however, was that I noticed with my 659 if you pull the hammer back halfway and then release it/let it slip from your thumb, there is a 'half cocked' detent that catches the hammer before it falls fully on the firing pin...

On my 5906, it appears that this doesn't happen; if I fully cock or partially cock the hammer, then release the trigger as the hammer is released downwards, it appears to fully fall to the firing pin. Is that normal for a 5906? It seems strange that a 659 would do this but the newer 5906 doesn't.