This is a well timed thread, I was just mulling over one of these vs. a upper to live on a RIA GI that has been sitting in the back of my safe. They definitely seem to get good reviews, and the price is right.
Kidneyboy, would you mind sharing a little about your mods, part compatibility, etc.?
Wow, that is quite the list! Thanks for sharing, I imagine that is a tack driver.