What is the age of a colt ar15 a2 hbar sporter serial number SP221219?

To determine the age of a Colt AR-15 A2 HBAR Sporter with the serial number SP221219, you would typically need to consult Colt's production records or a firearms expert. However, Colt generally produced the Sporter model in the late 1980s to early 1990s. Based on the serial number, it's likely that this particular rifle was manufactured in the late 1980s.