Weird warping on certain models

[KoggaJ]

I found an issue with certain faces of meshes rendering wrong or not rendering at all.
Here, the faces atop of the gun have much stronger perspective than the rest of it:

Additionally, few small faces are missing behind the handle:

This problem was spotted in Unreal Engine 5.3.1
I'm also attaching link to Google Drive with the FBX and Blender file for the model used. I make all my models in pretty much the same way, but only this one shows this kind of distortion. Applying the same material to a different model does not replicate the issue.
https://drive.google.com/drive/folders/1VDoO6WPx2oKSUfxnXt5XlYTuxM9Q61VB?usp=sharing