The penetration against a Mach 3 supersonic ASCM might even be greater than the GAU8's, given that the relative impact speed would be near doubled.What’s more heavily armoured, tanks or AShMs? The 1130’s closest western counterpart is the GAU8 avenger found on the A10, which is designed to kill tanks, and with an API round, can penetrate between 55-76mm of RHS at 30 degrees.
The biggest difference is the 1130 can put out 11,000 rpm, which is nearly 3 times what the GAU8 can. This beast is designed to throw out enough tungsten to shred an incoming missile as thoroughly and completely as possible to minimise the chance of even debris hitting the ship.
If the opportunity ever arrises, this thing can probably bore a hole clean through another capital warship ship in seconds.