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Although able to withstand a 9mm, these two classes are rarely employed within armored vehicles.
These classes can withstand an assault from weapons including sporting rifles and handguns—generally, guns that are shot at a close distance and lower bullet velocity, such as a .357 Magnum (B3) or .44 Magnum (B4).
This rating provides protection from AK-47s and other assault weapons and requires a ballistic steel thickness of at least 7.5 mm.
This rating has a high level of security and is meant to stop armor-piercing rounds. This is among the most popular protection levels as it is still straightforward to implement while adding a huge security advantage.
The strongest protection often offered, the B7 protection level stops various armor-piercing rounds fired from super high-velocity rifles, even sniper rifles. This is in many cases the highest feasible protection available within civilian-grade armored vehicles. Although, special purpose vehicles can and frequently do accommodate higher protection levels.