Hello fellow retro enthusiasts:
Question 1: Is the Colt 604 the only variant that was marked M16 on the magwell, between the US Govt property marking and Caliber? I've looked around a lot online, and in multiple reference books, and the only rifle variant I've seen that is marked M16 (not M16A1, or XM16, or anything other than M16) is the Colt 604.
Question 2: The Colt's Firearms Division markings came in the mid 1970s, correct? Is there any way a 604 would be marked with Colt's Firearms Division? Every 604 I've seen pictures of is marked Colt's Patent Firearms Mfg.
The reason I ask is that I bought an engraved 80% a few years ago, and at the time I wasn't that obsessed with correct markings. Now that I'm neck deep in the retro obsession, the markings on this lower aren't working for me. I'll probably just use it for a truck gun, but if there's any way a 604 would be marked with Colt's Firearms Division, I'll go through the trouble of converting this lower to an A1 and build a 604 clone with it.