If the person has a lawyer they should be able to give them a more specific answer based upon the facts of that case/ Armed robbery by itself carries a sentencing range of ten years to life. O.C.G.A. § 16-8-41. However, based upon the facts as described above there are other charges that any of the participants can be held liable for as a party to the crime. There appears to be an aggravated assault and there might be a kidnapping. Additionally, if the money was taken from more than one person, then for each person there could be a seperate count of armed robbery and or aggravated assault. Ultimately, I guess that you want to know how much time a person would actually serve. These are extremely serious crimes that normally warrant a long prison sentence, but each case is different. A sentence may ultimately be effected by factors such as cooperation, the county the crime occured in, and what role a particular individual played in the crime.