Shaking Parts on an Imported Animation

Hey,

the imported animation is a .FBX file exported from 3d's Max. The animation consits of two rigged arms holding a rigged handgun. The gun consists of seperate objects, for example the sledge and the base. The problem i am facing is that the sledge is slightly shaking even though nothing is shaking inside of 3d's Max.

Here is a link to a short video of the shaking:

I apreciate any help or slight guess!

regards Julian Kaulitzki

here are the import settings for the animation:

 

Double check this:
http://docs.unity3d.com/Manual/HOWTO-exportFBX.html

Make sure your models are at 0,0 origin in max

Also what max do you have? There's multiple formats ASCII and binary fbx formats , try both see if it changes anything.