Flyer with information about the ArmoredCloset Ballistic Window. The ArmoredCloset Acrylic Window (1.25" thick) is bullet resistant for 9mm and 45 Caliber handguns. The Ballistics Window gives you a view of the outside with the protection of the bullet resistant acrylic window that is 1.25 inches thick. The Ballistic Window has been tested against 9mm and 45 caliber bullets shot at close range. These handguns only scratch the surface of the powerful acrylic window. The Ballistic Window is a beautiful feature available for every ArmoredCloset.