>>The bar armour has nothing to do with stand-off distances or disrupting copper jets or anything like that. This is incorrect reporting that is sadly being perpetuated by the, normally pretty accurate, El Reg.
The bar armour has everything to do with stand-off. (See below).
>>The bars of the bar armour are spaced in such a way that the bars deactivate certain types of RPG fuse resulting in the warhead not being able to function, they can also deform the cone of the shaped charge prior to detonation.
The RPG fuse is a piezoelectric impact fuze, so the only way to "deactivate" the fuse is for the warhead to be jammed between two bars or be deflected from its previous flight path. Jamming the warhead between two bars is limited as the RPG warhead currently in use has an igniferous self-destruct, which, from memory will function 9 or 10 seconds after firing.
>>The stand-off distance for a shaped charge BTW is several feet or more, not the foot or so that the bar armour stands off at.
Bollocks. The RPG is designed so that its optimal stand-off distance is equal to the distance from the tip of the warhead to the front face of the cone.