unknown parts

[nauen]

Hi guys!
I recently managed to find a series of waffenmeister boxes apart from the notorious parts for 34/42 etc. there are a lot of parts that I have never seen - can you please help me? I have already identified number 2 - it is a part of 42 - see the last picture.number 1 looks to me like a part of a tripod or something similar - there is a spring inside, number 3 maybe an extractor - but from what? Thank you for any information!

Nau