Yes
if it is a 223 cal, then yes
Depends on markings on upper.
Yes it does, unless your barrel is stamped .223 .
Proofhouse.com has Colt sn data
You will have to call Colt with the sn to find out.
What is the manufacture date of a Colt AR15 rifle serial number 192754 model SP1
Proofhouse.com has Colt sn data. If it's not there, call Colt
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.
You can find out at Proofhouse.com in the Colt tables.
Proofhouse.com has Colt sn data.
You will have to call Colt to find out.
Proofhouse.com has Colt sn data.