Pre-Ban vs. Post-Ban M14/M1A

[floydthecat]

Are you also asking how to recognize a cast receiver v/s a forged receiver? Are you asking what's the difference between an M14 and an M1A? I know there's more to your question... Just because they are marked to Springfield Armory doesn't make them cast...

Correct Jim. One has to start with a rather short question and expand on it as the thread grows. I know the difference between a "real" M14 and an M1A. Sellers seem to often use the term M14 for either. I am not looking for a full-fledged M14 with selective fire...etc. I'd love to have one, but I imagine they are pretty scarce. I am having difficulty discerning a cast from a forged receiver based on descriptions, pictures and my limited knowledge concerning the M14/M1A family. I have no idea at the moment how to discern a forged or cast receiver on an SA. Thought there may be some way to tell from the serial number or differences in the eras between, B4 and after pre-ban.