Raycasting the backfaces of a mesh?

Hello there guys !

I’ve been wondering if there’s a form of raycasting in UE4 that can be used to trace the backfacing surfaces of a mesh or in other words ,the point where the ray exits the mesh instead of the point it enters it. I need this kind of raycasting functionality in order to measure the LOS thickness of an object for terminal ballistics calculations. So far I hadn’t got any luck browsing through the documentation or searching for posts online.

Thanks in advance ,