Dang, that's good to know. I have a 75B the the factory mounted OKO. Sadly, the OKO itself cracked. I looked all over and just could not find an OKO anywhere. Located one in like Hong Kong and decided that the gun just had to have the OKO so I ordered it. The happy part is it arrived and works. I paid about $250 as I recall but I sure would have felt better to buy one local. It's a great sight on the CZ 75B although it looks like a Space-Gun.
