Where did they get them?

Yesterday, we saw that Rome and Rei used the weaponized VIRUS units to dig a sloping tunnel down to the basement of the Tevatron. At first, they didn't know which way to go but Rome's infrared vision allowed her to detect the fact that the tunnel labeled Meson exhibited signs of battle. Rei correctly assumed that Jack Henry would have set up for the final battle exactly where the Ark Lords wanted to go. As our heroes headed down the hallway, they saw something very peculiar. I'll let them tell you:

     “Look,” he said. “Rome, you’re right.” Rei pointed up at one of the wire carriers. There were slashes through it that looked like they were burned. “Laser pulse rifle burns.”
     “Why would they fire their rifles up there?” Ursay asked.
     Rei looked at the opposite wall then back at the burns. “Men with lances, knives, crossbows, anything could have hidden among all this clutter. By now, the Ark Lords knew they were here. Let’s keep going.”
     They continued along, taking note of the increasing signs of battle. More holes, more burn marks. “Bullet holes,” Rei said. “So now the battle really took hold. The only thing I still don’t understand is where they got the guns.”
     “Perhaps here,” MINIMCOM said. Rei glanced up and saw MINIMCOM standing at the top of a short stand of steps. The steps were pressed up against a large, white propane tank mounted on stilts. MINIMCOM reached forward and turned the sealing ring inserted in the center of the door that was bolted onto the tank. Rei started to warn MINIMCOM but before he could get the words out, MINIMCOM already had the door open. The livetar swung the door all the way to the side and stepped inside the cylindrical room. Rei, Rome and Ursay walked up the steps and joined MINIMCOM in the chamber. The inside of the tank had a false floor and surprisingly, a very dim light emitted from panels in the ceiling. MINIMCOM twisted his cape behind him then borrowed OMCOM’s trick and his shoulders lit up, illuminating the chamber completely.
     “Oh!” Rome exclaimed. “This looks like the back room in Edgar’s storage bin.”
     “Yeah,” Rei answered, looking around. “This was an armory.”

Well at least the mystery of the Vorasdock was now solved. Jack Henry and the rebels used the Ark Lords' own weapons against them. Tomorrow, Rome picks up a souvenir that plays a critical role in the denouement.