If you do a search on FEG and or Hi power clones You'll see a lot of information. Unfortunately, FEG also copied the SW auto system, which is where the gkk 45 came from. It's double action mode was sort of gritty and the finish wasn't very good. Still, it worked.
FEG is now working with Charles Daly to make /market 1911's. I have no experience with these.
The NEW FEG stuff is vastly superior in quality/workmanship to the older stuff, less machining marks, better deeper bluing etc. I'm wearing the grip of my older FEG grey, but I tend to do that on every handgun I shoot a lot.