Sen. Dianne Feinstein and 22 other Senate Democrats introduced an assault weapons ban on Wednesday designed to "ban the sale, transfer, manufacture and importation of military-style assault weapons and high-capacity ammunition magazines," her office said in a statement.

"To those who say now isn't the time, they're right — we should have extended the original ban 13 years ago, before hundreds more Americans were murdered with these weapons of war," Feinstein said, referencing the Federal Assault Weapons Ban that was passed in 1994 and expired in 2004. "To my colleagues in Congress, I say do your job."