They convert a CZ 97BD or 97 B, I ordered BD, to 10MM. It ships with the 10MM and 45 ACP barrels 1 10MM mag (I had them send a second 10MM) and 2 45 mags. I will be able to switch from 10MM to 45 by simply changing the barrel, recoil spring and extractor. I wasn’t able to find it on their web site either. I had to call.