You can be arrested for possessing a illegal firearm.
Depending on circumstances, everything from a fine to the death penalty
no they can't
No.
Only if you legally possess the firearm in accordance with federal and state laws.
carrying a firearm w/o a license
Chamber empty in a retention holster
In most cases, self defense.
Jail is one, if you are not in compliance with applicable laws.
No
Plaxico Burress was sentenced to two years in prison for accidentally shooting himself in the leg in November 2008 while carrying an unlicensed firearm in a New York City nightclub. He served approximately 20 months of his sentence before being released in June 2011.
You can find a complete guide on laws governing firearm in PA on psp.pa.gov/firearms-information/Pages/Carrying-Firearms-in-Pennsylvania.aspx
Indiana does not have gun registration. If you're carrying your firearm in the legal and prescribed manner, there is no requirement for it to be registered.