So you think you know guns?

C-90 (esteemed smartass of #gunblogger_conspiracy) has a challenge for you. Listen to the audio files below and try to identify what firearm each one is, just by hearing the action cycled.

Action 1

Action 2

Action 3

Action 4

I'll post answers whenever C-90 give's em up. probably in about a week. So far I've gotten one right. How many can you get?