Generally, Bullet-proof glass has the following three-layer structure:
Level(CN) | Gun type | Bullet types | Bullet speed(m/s) | Distance | Thickness |
(m) | (mm) | ||||
F64 | 64 type 7.62mm hand gun | al-core 4.72-4.78g | 300-320 | 5 | 19 |
F54 | 54 type 7.62mm hand gun | steel-core 5.56-5.69g | 420-440 | 5 | 21 |
F79 | 79 type 7.62mm micro-submachine gun | steel-core 5.56-5.69g | 480-515 | 10 | 25 |
F56/AK47 | 56 type 7.62mm submachine gun | steel-core 7.75-8.05g | 710-725 | 10 | 35 |
FJ79 | 79 type 7.62mm Sniper rifle | steel-core 9.45-9.75g | 830-870 | 10 | 40 |
F53(armour-piercing bullet) | 53 type 7.62mm Sniper rifle | armour-piercing bullet 9.45-9.75g | 830-870 | 10 | 68 |