How much force can bullet proof glass withstand?

Bulletproof glass is designed to withstand various types of ballistic impacts, with its resistance depending on the thickness and materials used. Typically, it can endure forces equivalent to bullets fired from handguns to certain rifles, with ratings like Level IIIA capable of stopping .44 Magnum rounds. The specific force it can withstand varies, but it generally ranges from 600 to over 1,000 joules, depending on the classification and construction of the glass. Ultimately, the effectiveness is determined by the specific standards it meets, such as those set by the Underwriters Laboratories (UL) or the National Institute of Justice (NIJ).