Could something similar to this be in AIFV / YPR-765?
An envelope or panel member having formed therein a plurality of angled holding slots adopted to loosely support armor elements disposed in the designated holding slots. Air space areas within the envelope can be sealed or filled with plastic, or the like, depending on need for buoyancy to overall vehicle design. In this developed form, a complete panel or envelope is ready for application to the side of an armored vehicle.
Would something like this give at least some form of protection against HEAT?