Nathan said:
CZ75 B SA
It has a slightly different machining than the other full size cz75's.
They do have a slightly different slide (more material near the muzzle), and an extended beavertail, but I don't know that the frame itself is greatly different enough to really matter that much with regard to holsters.
The 75B SA I had worked well in the holsters I was using for my other CZs,
but some of those were leather, and another was an adjustable Safariland -- there's a bit more "give" in all of those holsters when used. I never tried a 75B SA in a Fobus or kydex holster for the standard 75B DA/SA gun.
Your best bet is to take your gun to a gunshop or gunshow and try some holsters out (with regard to how well the gun and holster match up.) If you can't do that, an internet search may be your friend. Amazon and EBAY both have them.
As a last resort, and you don't want to spend a lot.. get a Fobus holster for the CZ-75B. You can heat up the plastic a little (I used a heat gun I got at Harbor Freight years ago) and soften the plastic enough to let any problem areas reform when you push the gun into the holster.
I like Alien Gear holsters, and you can contact them to see if they can provide a holster. They're inexpensive (most under $40) and offer interchangeable "shells" that can be changed out as guns change.
Note: If you work with an existing holster that isn't quite right, you only need to heat the area where it doesn't fit quite as well as you'd like. I've done this with Fobus holsters when I had several holsters I wasn't using, and couldn't find a new holster quickly that I needed for a new gun.
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