I have a stripped upper from Red X Arms that I've been considering pairing up with my GCO lower when I get it. It seems like a well made piece, but since they only cost about $90, I was wondering if anyone has any experience with them, and if I should consider getting a higher quality upper. My plans were to build three exchangeable uppers in different calibers to go with one lower, preferably all three using the same brand upper receiver.
