I haven't done much testing with multiple hit weapons. However, if it's anything like the single hit formula, 100% - 2 * (AttackerAGL - DefenderAGL), then your robot would never land a single hit. The formula says that a robot with less than 49 agility would always miss against Arsenal. Actually depending on the algorithm, it could be 0% or 1/256. If 1/256, then your chances of hitting all 7 times would be 1/256^7 = 1.3x10^-17. Hence, I have to study at the algorithm closely to see whether it's 0% or close to 0.