100-1200 USD or so
value depends on overall condition
500-900 uSD
@1964
NOT SURE OF YOUR MODEL, MY BUDDIE HAS AN ORIGINAL COLT AR 15 ,ITS WOTH $2000 IN CANADA
Colt first introduced the AR-15 SP1 in 1964. This model was the civilian version of the military M16 rifle and marked the beginning of Colt's production of the AR-15 platform. The SP1 became popular for its lightweight design and modularity, setting the stage for the AR-15's evolution over the following decades.
1974
You will have to call Colt with the sn to find out.
100-1500 usd
1970
1000 USD
You must call Colt with the serial number to find out.
Post 78 given the sn you provided