This is a small modern buzzer. 

No AMS needed!

Assembly guide below!

You need one helical compression spring to have a functioning buzzer. 

A spring can be ordered via the bambu lab store (see BOM below). 

Any other compression spring with the following dimensions will work too: 0.6x8x20 mm

If the buzzer ball will jump out, just use glue to keep the shaft and ball together.

Dimensions:

WxLxH: 64x64x70mm