I went to my local gun shop today looking at new guns and me and the gun guy got to talking about just about everything. One thing he said that really caught my attention was he said the CZ o/u was a knock off of beretta. Wheither that's true or not is another story. Sense he said that I've been wondering what the CZ o/u compare to internally. Is the design internally and the way the gun locks up similar to other brands? Also with the type of metals they us? If so what other brands and how are they similar? If what he said was true I find this very interesting! Thanks guys