Have you seen the review that was done in the Book of the AR15?
Yes, I realize that a magazine author is not the same as a regular individual, and there can be some "bias", but it had complete pics and everything.
Someone did upload the entire article online, either here or on ARFCOM.
The pics have been out for a long time. Even LMT's catalog has pics. The pics in Book of the AR15 are much better, and show more detail.
Most people have clearly seen the piston, and what it looks like.