Tappin could spend 33 month sentence in the UK
Christopher Tappin, 66, of Orpington, Kent, had pleaded not guilty but changed his plea at a hearing in El Paso, Texas, after an agreement with US prosecutors.
His guilty plea, to one count of the indictment, calls for a 33-month sentence which prosecutors have said they will not oppose him serving back in the UK.
Christopher Tappin pleads guilty in US court
British businessman Christopher Tappin has pleaded guilty to selling surface-to-air missile parts to Iran, at a court hearing in the USA.
Christopher Tappin has been freed on bail
A retired British businessman who was extradited to the US in February to face arms dealing charges has been released on bail.