Damage Shield and Autofire

[Whippersnapper]

Although the book states that a Damage Shield will only inflict damage once per attack roll (Presumably to prevent abuse from an Autofire Damage Shield that can hit with dozens of shots automatically), if the Damage Shield was NOT an automatic hit, would it be appropriate to allow an Autofire Damage Shield to deal multiple hits if it was subject to the usual limitations of requiring an regular "To hit" roll?

The concept in question is a Martial Artist who responds with an instantaneous flurry of blows whenever he is hit. Will requiring a "To Hit" roll for the damage shield be sufficient to prevent abuse, or will the potential damage of this attack likely be an imbalanced threat against melee based opponents?

[Steve Long]

APG 133 has rules for Autofire Damage Shields, including how to determine how many shots hit. This is an exception to the standard rule about "one hit per Attack Roll."