I had the same problem with an RRA BCG a couple of years ago. If you search the archives on TOS, you may be able to find it.
I used to have to pry the cam pin with a screwdriver, process that took about five to ten minutes. And when re-assembling, I would have to use a mallet. No performance issue, but taking it appart was annoying. I contacted EagleFirearms and they send me a new RRA BCG, no questions asked. The new one did not have that problem, but had two burrs in the rear that chewed the crap out of the buffer.
After these two incidents and more extractor problems, I decided to go with BCM.
"However horrible the incident of war may be, the soldier who is called upon to offer his life for his country, is the noblest development of mankind." - General of the Army Douglas MacArthur, Manila, 24 August 1936
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