Recently purchased a 1964 SP1 from a dealer off this site. Received it sat and am happy with it except for the fact that it has a full auto type bolt carrier. It appears to be original because there are no notches in the carrier, which was how they were in'64'. Is it possible that Colt put the wrong carrier in it? Did Colt always have 2 different types of carriers? What should i do? Any help would be greatly appreciated.