How do I fix my Normals (I have flipped them and does not work)

Hello all,

I'm just starting on developing a game, but I am having a problem with flipping normals in Blender. I have the setting in which I can see the blue lines indicating normals on, and I can see that the normals are all flipped and that they should be visible, but when I go to open it in Unity it just messes up and I can see through it. I've been scouring many forums today and I can't seem to find anything like this problem. I changed the Normals setting in the import section to "Calculate", but it still looks the same. Whenever I try resaving it and then importing it. Here are two screencaps of what is happening visually. I'm trying to make an extremely basic blocky pistol-type object, just for a test. I've tried resetting my scale, which doesn't work either. Here are a couple of pictures both of the import explorer tab and the bottom assets port: Picture 1 and Picture 2. By the way, it is a .blend file, just to make sure you guys know that my file extension isn't messed up or anything.

Thanks in advance, Scott