A federal appeals court in New York has ordered a new sentencing for an Armenian immigrant sent to prison for 22 years for plotting to sell anti-aircraft missiles and other military weapons to an FBI informant.

According to AP, the 2nd U.S. Circuit Court of Appeals said that a judge incorrectly calculated the factors used to determine the seriousness of the crime carried out by Artur Solomonyan.

Otherwise, the appeals court upheld the conviction and sentencing of Solomonyan and five others. They were sentenced in 2009 on arms trafficking and conspiracy charges. The only weapons actually delivered were a dozen firearms, including a machine gun.

A lawyer for Solomonyan did not immediately return a phone message for comment.