After looking online and knowing what scope rings I wanted for a CZ 452 American, I went into SW to buy a set.
Ask the guy behind the counter if they had that ring including part number, as I was going to use them on a 452 American.
He informed me that CZ uses 11MM rings, that what I wanted wouldn't fit.Tried to unsuccessfully to explain that the 452 American uses 3/8 rings not 11mm.
Then I ask if I could see the package that was behind the counter, he refused me, so I left, ordered the rings online and they fit perfect.