G34 Trigger not working

[visionviper]

This is the best I can do at explaining:

 

Part circled in red:

This is connected to the trigger. This is the part that when you pull the trigger it makes contact with the part circled in blue, that released the hammer and makes it move forward. Problem: That piece has a smaller piece connected to it that actually makes the contact with the piece in blue. This piece is being pushed below the piece in blue, and therefore the hammer is not releasing. If I take the slide off, it works fine. The problem lies somewhere with the slide. I just don't know where and how to fix it.

 

I hope that you people that own a Glock know what I am referring to, I am terrible at explaining this stuff.

[visionviper]

UPDATE TO PROBLEM:

 

I found that if I loaded up a mag, the gun work's fine. The mag must have gas in it for it to work.

 

The part, that is being pushed down, is part 92.