How many years is someone facing with multiple counts of armed robbery, even though the gun was unloaded?

In California, in excess of 50 years. Under the “10-20-Life” laws for gun use, a 10 year enhancement can be assessed for each victim on whom the gun was used, plus 9 years for the robberies. Of course, these cases depend on the facts, especially regarding the gun use. You need an experienced criminal defense attorney in this case and make sure they are licensed in California.