One thing to keep in mind. Hard armor plates (level 3&4), need to be worn ON TOP OF 3a soft armor. Unless your plates are specifically made to be "stand alone"
Using non stand alone plates does not offer the protection you think. Backface deformation and spalling can be lethal under these plates if struck even if hit by rounds they are rated for.
Stand alone plates in a simple carrier = good to go
Non stand alone plates on top of soft armor = good to go
Non stand alone plates with just clothing under = NO GO
Using non stand alone plates does not offer the protection you think. Backface deformation and spalling can be lethal under these plates if struck even if hit by rounds they are rated for.
Stand alone plates in a simple carrier = good to go
Non stand alone plates on top of soft armor = good to go
Non stand alone plates with just clothing under = NO GO