Hey there people! I have been working on a small project. While importing a gun model from Blender to Unity, something weird happened.

The gun model's top deformed in a weird way, even playing the animations won't fix it. It even weirder, that in Blender, it looks fine, and all other gun models are totally fine!

Also, these models don't have backfaces, because the game they are from did not have backface rendering capabilities, I suppose.

How can I fix my model?

What format did you use to import the model?
You mustn't use anything except .fbx.

@dedted Yeah, I always use FBX for the models. This one is FBX too, but as you can see, its weird.

Shoot me the .blend file

@dedted Here you go buddy: https://drive.google.com/open?id=1ofNthRYH7FSS9cnXu0zIIk7m_uvpmSdR

Hope you can figure out something from it Also you don't have to texture it, and please don't change the materials, its important that they stay as they are

I don't see any problems. Try deleting the lamp and the camera and maybe combining the meshes.

@dedted Combining the meshes? And if there's nothing wrong with the model, there might be something with Unity missing out on something?