The number of guns confiscated from Metro riders in the past two years is greater than the number confiscated in the previous 12 years, according to Metro statistics reported in the Washington Examiner.
Two years ago, 21 weapons were recovered.
Every other year back to 1997 just 10 or fewer guns were confiscated.
"I don't think people should look at these numbers and be concerned about riding Metro," said spokesman Dan Stessel.
Guns are allowed in the system in Virginia, but as soon as the train or bus crosses into Maryland or the District, the guns are considered illegal, said Stessel.
Metro said it's not clear why so many more guns are being found.