18, the same as any other state.
You have to be 18 to have any real assets to your name.
You must be 18 years of age to purchase a shotgun or rifle,and you must be 21 years of age to purchase a handgun.
You must be the age of majority to hold real property. In illinois that is 18 years old.
you must be 65 or older
To own property you must be an adult. That means 18 years old in most places.
According to info available on ar15.com, your weapon was manufactured in either late 1972 or early 1973. I own one made in 1974.
You must be 18 years old to vote in Illinois.
Illinois became a state in 1818.
Try AR15.com Try AR15.com
You have to be 11 years old to babysit in the state of Illinois!
No public data- but you can contact Rock River customer service
If it is one of the recent Colt .22LR AR15 rifles, then the answer is no - they are completely different internally.