Did I get a realdeal 733 Upper?

Guys trying to figure out if this upper I got in trade for some work is a 733 or ?






I also got the coated metal stock with the upper.
I know the moderator is not correct and is an aftermarket piece. But the rest from my research seems to be close to a real 733 upper.
Am I right? This is my first venture into the retro rifle setup.

The receiver with an LM forge code is not Colt.

LM LAR / Martin Marietta (Army Spares Contract)