CM16 Barrel issue

[JamesAirsofterAgent]

Went to check the cm16 ready for a game next week, and to my horror the barell is loose. The barell with the front site attached slides in and out as shown by the pictures:

 

As well as this, there is a small silver coloured tube which seems to have come out of place due to this:

 

I have no idea what to do, but really hope it is not broken. The more I move the rifle, the more the silver tube moves and scrapes around so I am trying not to do that. I have not shot it to see if it still works for fear of causing more damage. 

 

Does anyone have an idea of what to do? 

 

Thanks. 

[JamesAirsofterAgent]

Update: The front site post barrel part has now just completely fallen off. 

Update: Fixed, zero one gun tech was super helpful. All good now.

phew