Strange Model Shadow

Hello, I have problem with mesh shadowing I dont know why on the screenshoot there is shadow. It’s shouldn’ be there… I’m making this model in Blender and there it’s looking nice but in Unreal it’s bad. Can anyone help?

Looks like a bad UV or something along those lines.

How can I fix this?

You’d need to redo the UV map for the gun. Looking at it closer, it looks like there are some really badly stretched UVs right by the red circle. Just look around for guides on UV mapping.

Looks like a smoothing issue

Yeah now that I look at it again, it looks like it could be a bad normal from smoothing groups. It might be an edge that needs to be turned; within the polygon.