[47_MasoN_47]

IIRC it's the same as for all the other HP pistols.

Try this video -

Here's another one with some nice metal to listen to -

 

[47_MasoN_47]

Can you take a picture of it? There are small springs in a number of places...especially in the trigger group. If you didn't take it apart that far, it could be the sear spring...I can't recall off the top of my head what all springs are inside the pistols as I've only taken mine down once.