The requirement of the bulletproof classes M2 and M4 are met, on the basis of the tests of the resistance class C2 and C4 according to DIN 52290, part 2. Depending on the type of the operational demands the bullet resistance class is determined.
In order to confirm the resistance class M2, a .357 Magnum is fired off from a 3 meter and to confirm the resistance class M4, a .308 Winchester is fired off from a 10 meter distance.
Bulletproofdoors are used in areas with increased security requirements against invasions and raids. For example, banks, savings banks, airports, police stations, ministries and embassies are the commonly used areas for the bullet resistance doors.