Yes, bulletproof glass can be broken, but it takes serious time, effort, and specialized tools to get there. “Bullet-resistant” is really the more accurate term, since no material holds up against every possible threat forever. Fire enough high-powered rounds at the same spot, or work at it with sledgehammers and saws for long enough, and the glass will eventually fail.
But that’s not really the point of bullet-resistant glass. It’s not meant to be indestructible. It’s meant to buy time and protect the people behind it. Even after the glass cracks and shatters, it typically stays in the frame and keeps functioning as a physical barrier. That delay is usually enough for security to respond or for people to get somewhere safer.
Compare that to standard or even tempered glass, which would fail almost instantly and offer no real protection. So yes, it’s physically possible to break through. But the noise and time it takes make it an incredibly strong deterrent in nearly every real-world scenario.
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