Propaganda piece. Citizens better get their walls reinforced with bullet proof material.
I agree on the propaganda, but typical loadings of the .223 round are very poor penetrators of building material. If all I have for cover is two layers of drywall and some two-by-fours, I rather be faced with a .223 attacker than a 9mm attacker.
The 223 is quite lethal, but it fragments into generally non-lethal parts when it passes through light building materials.