Will a .223 Remington Penetrate Tempered Glass?

Yes — defeats a 6 mm tempered glass barrier
Penetration depth
26 mm (1.0″)
Impact velocity
990 m/s (3248 fps)
Muzzle energy
1764 J (1301 ft-lb)
Bullet behaviour
Intact

Fired at the muzzle, a representative .223 Remington load (3.6 g, FMJ, 990 m/s) reaches roughly 26 mm (1.0 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.

.223 Remington against other materials

MaterialDepth (mm)Depth (in)
Red Brick176 mm6.9″
Concrete171 mm6.7″
Steel A3613 mm0.5″
Steel AR5008 mm0.3″
Aluminum 606124 mm0.9″
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