Not on any tank built since about 1935. Ma Deuce (.50 cal heavy machine gun) was the second antitank gun in the Army's inventory, thus the name. Most the rest of her assertions are either similarly out of date, or only theoretically possible.
Call me a black helicopter crackpot, but I have a theory as to why the Fascist left-wing elitists want the .50 BMG rifles banned. They know that it will defeat the armor on the 1/2 million dollar chauffer driven limos they ride around NYC, the DC, and Hollyweird in.