In the game is very poorly implemented the bullet hits of these heavy rifles in the armored glass. This detail misleads the player.
Initially I ran the test with "Hunter" without a crew. I shot the armored glass and the glass is not broken. I thought the bullet does not penetrate through, because in the game does not exist the texture with hole.
However, the bullet can still penetrate through the armored glass and able even kill the driver, if the player will shoot into the "Hunter", with the crew inside. The player does not see the damaged texture and thus does not understand that the bullet passes through the glass.
We see tests of real life here: http://www.youtube.com/watch?v=1fCZvOHd5dg&feature=youtu.be
Please note, in the real life, the glass is completely cracked!
Please add this texture if heavy weapon breaks through (but does not destroy completely) armored glass.