in MOST of the US, there is no requirement to register a gun.
I know of no gun registeration in Maryland. No such thing as a unregistered gun.
There is no Federal law requiring registration of guns. MOST states also do not require it. No penalty.
As long as you legally possess the gun, none. Texas does not require registration of ordinary Title I firearms.
PA doesn't require registration ofordinary Title I firearms, to include handguns.
None. PA does not require gun registration- like MOST of the US does not.
Alabama - like most states - does not require registration of ordinary Title I firearms.
Like most states, Georgia does not require registration of ordinary Title I firearms.
Depends on the law where you are, and whether it is legal to have a gun, and what you were doing with it. Without that information, we cannot even guess at an answer. Sort of like "what is penalty of having car?"
$75
Depends on if you are breaking the law.
There is no law requiring registration of ordinary firearms in Illinois. The possessor must have a State Firearm Owner's ID Card.
None.