What is the manufacture date for a Colt AR 15 model sp1 serial number sp 204803?

The Colt AR-15 Model SP1 with the serial number SP 204803 was manufactured in approximately 1979. Colt typically produced the SP1 models in the late 1970s and early 1980s. For precise dating, you may refer to Colt's manufacturing records or consult a Colt historian.