also this would be good for smashing windows to set up an ambush as shooting just alerts your prey

This is realistic just look at bren gun carriers the people inside would fire small arms PIAT's and anti tank rifles

that's not the event I referenced http://www.rrmemphis.com/op030.html read this

there was a shoot-out with the FBI where two robbers where shot like 30 times each and the shoot-out only ended when one agent used a shotgun. but head-shots should always kill, unless the kevlar helmet stops the bullet? do you mean shooting the face or the helmet.