There aren't even antiproton weapons on the ground! They're purely space-based! No LCF spacecraft have been disabled with their weapons intact and completely abandoned by the rest of the fleet, even if they were, there isn't enough time to haul the entire ship down to the newly formed colony that is based on a planet that only had a few underdeveloped communities in the first place, and then do what it took the Equestrians multiple pages to do all in the time of a few vessels entering a higher orbit.
Usage on the ground is impossible due to the fact that they need to carry a particle accelerator and electrical generator with them. Not even unicorn blood or green rocks will make the things work like that! Even if we operate on soft sci-fi, Rule Of Cool-powered Anime physics, it wouldn't work.
Usage on the ground is impossible due to the fact that they need to carry a particle accelerator and electrical generator with them. Not even unicorn blood or green rocks will make the things work like that! Even if we operate on soft sci-fi, Rule Of Cool-powered Anime physics, it wouldn't work.