Why U.S. Cops Always Hide Behind Car Doors

In Hollywood films, police officers routinely take cover behind their car doors in the middle of a gunfight. Far from being a made-up movie trick, it’s something real cops actually do. The obvious question is: why? After all, a standard car door is made of thin sheet metal that can’t stop a bullet — not from a rifle, and not even from a handgun.

The answer depends on the vehicle. A regular car door offers little protection — even birdshot could likely punch through it. A 9mm round will almost certainly pass through the door and cabin. But not every U.S. police cruiser is “regular.” Today, most patrol cars come equipped with one or more ballistic panels inside the doors. These are usually rated at Level II protection and can stop rounds up to 7.62mm.

Ballistic inserts in cruiser doors aren’t exactly new, though. Some sources say the first armored patrol cars in the U.S. didn’t appear until the early 2010s. And even today, smaller departments often rely on older vehicles without any bullet-resistant upgrades. That’s why, in a firefight, officers will sometimes drape a spare bulletproof vest over the car door window. It’s no substitute for a built-in ballistic plate, but it’s better than nothing.

The door also serves another purpose: stability. Officers can rest their arms on it to hold a position and keep their sights trained on a sector for several minutes, rather than firing hastily. Standing by the door also gives them the option to drop behind the vehicle for at least partial cover — not full protection, but enough to improve their odds thanks to deflection or ricochet.

Finally, there’s a practical advantage. By staying near the door, an officer keeps the option to jump back behind the wheel and give chase if the situation suddenly changes. And this tactic isn’t unique to the U.S. — police officers around the world use it the same way.