Firearms Tactical

AK & 12 Gauge vs Auto Glass

Law enforcement and military specialists have studied bullet performance through glass for years. At the root of their studies is the simple fact that bullets respond differently to soft targets when traveling through a glass barrier.
The most common glass barrier you will find in a tactical situation is auto glass. This glass is laminated, which makes it especially difficult for bullets to penetrate. If you practice shooting through auto glass, you will find that the glass can sometimes tear the outer copper jacket off of the bullet’s lead core. This can create multiple impacts on the target inside the vehicle, which could benefit your scenario depending on what you are dealing with. The bad part of this, however, is that the deformation of the bullet can lessen its impact on your intended target.
We wanted to test out what would happen if we used two common tactical rounds, the 7.62×39 and the 12-gauge slug, on auto glass at a distance of 15 yards. The goal was to see which round was more effective on soft targets, and to learn how the laminated glass would respond to the impact or high-powered and large-bore projectiles. Here’s what that looked like:

Specs:
Test 1:
Bullet: 762×39, from AK47
Distance: 15 yards

Test 2:
Bullet: 12 gauge slug, from Mossberg 500
Distance: 15 yards

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