I believe what Nathan was meaning that the simple act of creation is a significant power let alone creating as devastating a substance as anti-matter.
But sure I'll give you a chance to explain yourself, how do the qualities of anti matter, specifically positron antimatter, serve in creating a reactive armour?
I would also recommend doing more reading on anti-matter as sure a 'hundred-trillionth' may kill someone in our world but generates a miniscule amount of energy. Like lightbulb level not laser beam level. Antimatter is powerful but a trillionth is a very small fraction.