How deep does a .45 ACP penetrate Tempered Glass?

At the muzzle, a representative .45 ACP load penetrates approximately 10 mm (0.4 inches) into tempered glass.

What is the impact energy of a .45 ACP?

This .45 ACP load carries about 504 joules (371 ft-lb) at the muzzle.

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Will a .45 ACP Penetrate Tempered Glass?

Yes — defeats a 6 mm tempered glass barrier

Penetration depth

10 mm (0.4″)

Impact velocity

260 m/s (853 fps)

Muzzle energy

504 J (371 ft-lb)

Bullet behaviour

Intact

Fired at the muzzle, a representative .45 ACP load (14.9 g, FMJ, 260 m/s) reaches roughly 10 mm (0.4 inches) into tempered glass. That is enough to defeat a typical barrier of this material — treat anything behind it as exposed.

About Tempered Glass

Tempered and automotive glass runs about 6 mm thick.

.45 ACP against other materials

Material	Depth (mm)	Depth (in)
Red Brick	46 mm	1.8″
Concrete	24 mm	1.0″
Steel A36	1 mm	0.0″
Steel AR500	1 mm	0.0″
Aluminum 6061	6 mm	0.2″

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Will a .45 ACP Penetrate Tempered Glass?

About Tempered Glass

.45 ACP against other materials

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