Non-Bulletproof Glass

So I have followed tutorials and learned how to make bulletproof glass and tried to reverse engineer that into making non bullet proof glass, but I always end up having to make the whole chassis col id 120-122 to make the windows work, but then as you know the entire chassis now has bullets flying through the entire thing or the bullet now has crash mechanic and its still bulletproof.. This is my first time ever reaching out to a place to ask questions or anything so this is new. Thank you! Appreciate everything and everyone.

Are the only flags on the vehicle, The sides arent bulletproof, the windshield is not, then the windscreen_r is bulletproof. I have tried to repeat the steps like 10 times now and same outcome each time lol.