Gun-rights expert call local challenge to SAFE Act ‘significant’ – In the marble-columned courthouse where five Supreme Court justices ruled that American citizens have the right to keep and bear arms, the gun-control law that Gov. Andrew M. Cuomo calls the SAFE Act could one day find itself in grave danger.  The federal lawsuit filed in Buffalo earlier this month raises serious constitutional questions about several of the new law’s provisions, according to legal scholars who specialize in studying the Second Amendment – which guarantees gun rights – and who are familiar with the New York measure.