I am the owner of the website linked above - CustomAR15.net/Integrity Arms and was sent this link from a customer
I'm not going to get into a back and forth about anything in this thread, other than to clarify a few things.
I can only speak for the ones I sold.
I got an email about this concern a few months ago which initially had me question the uppers. Not the source, just that batch specifically. This is the email I received back after I emailed my source.
"On the upper problem, dang it, your client caught us! We have a fleet of upper elves
that glue little C's on our uppers every Thursday afternoon. No one has caught us
until now! Actually, that's pretty weird and we have not run into the problem until
now, but I have reached out to the OEM and will let you know what I hear back. I
would normally say that's just a bad forge mark, but that C does actually look like
a wire so I have asked as I am now curious."
"It's indeed a forging issue, where the aluminum didn't flow into the 'C' inclusion
of the die, causing a fragile 'cold joint'.
It's not an issue with the other 3 most likely, it's a one off that they had never
seen before either. So, I suppose do whatever the customer wants to do, but you can
resell the other 3 and we'll obviously take the 1 back."
I have always stood behind my products 100% and this is no exception. I have absolutely no problem issuing a refund if you're unhappy, just please don't question my integrity (no pun intended). Integrity Arms is my families livelihood and we have been modestly successful because we treat people right. Typically we have a 30 day no questions asked return policy, but if you are unhappy with an upper I will issue a refund. Just send it back and I'll issue the refund personally same day.
These are genuine DOD contract M4A3 uppers. Not fakes and not a scam...at all. I unequivocally trust my source, and if you had the chance to meet my vendors in person I promise you wouldn't question their integrity either. Dimension and specs are 100% spot on.
A handful obviously had cosmetic issues. It happens and I apologize.
Glad to refund anyone's money who isn't happy, 100%.