Miller said a law limiting handgun purchases to one a month would help reduce the number of guns in the city.
"I don't understand why someone needs 12 guns a year," Miller said.
"The state will not let us enact our own gun laws," she said. "We cannot legislate an attitude change, but this legislation is a start."
Citing the 116 homicides reported in Philadelphia this year, Miller said that gun violence had become all too routine.
"Philadelphia has become a place where everyday we expect to hear that someone has been murdered. . . . We really need to get a handle on gun laws."
Walter M. Phillips Jr., chairman of the Pennsylvania Commission on Crime and Delinquency, also urged lawmakers to pass measures restricting the sale of guns.
He later asked the panel, which included State Reps. Tony Payton Jr. (D., Phila.); Thomas Caltagirone (D., Berks); and James R. Roebuck Jr. (D., Phila.), "Are not 12 guns a year enough?"
John Mirowitz, Southeast Regional director of Unified Sportsmen of Pennsylvania, said that allowing purchases of only one gun a month did not work, citing other states that had such laws.
"When you start talking about [one gun a month], you don't understand the sportsmen's community."