There are no "pirated" Glocks, yet. But there was a clear attempt to copy the same for the most part, the S&W Sigma. I got an American Handgunner article that shows the Glock and Sigma receivers side by side, they looked almost identical.
It will only be a matter of time before an "illegit" Glock comes out, and we all know who will do it.
"My garden is smaller than your Rome, but my pilum is harder than your sternum."