Wraith Tactical posted up this video of their C.A.R.R. Pack (Concealed Armored Rapid Response). It is a back pack that has an armor plate as well as medical pack. We have seen backpack systems that transform into personal armor plate carriers but this one has a medical kit with it. Now those other backpack systems were able to incorporate a weapon into the pack. This does not seem like it does but you might be able to have a pistol in a holster attached to the armored chest plate carrier.