Are we still under the Judaic law system after Romans 3:21?

Les explains that in the gospel accounts, the people were to keep the law, and with the appearance of the Messiah an added responsibility was to believe He was the Christ, the fulfillment of all those Old Testament covenants, but it was still based on the Judaic system of law. Then Paul says that by the law there is no justification, for the law is the knowledge of sin. Les emphasizes that the law does nothing but condemn and has no power to save anybody. Romans 3:21 begins with “But now,” indicating a change. Les says we are no longer under that Judaic system of the Law; now we are under something totally different, and the righteousness of God is without the Law.