What do the markings on a CZ shotgun choke tube mean?
4 notches = cylinder choke (open), and one notch = full choke (tight)
Should have choke tubes, being that you can change it to whatever choke you want, so there would be no marking on the gun. There would be markings on the end of the choke tube though, usually between 1-5 lines. Not positive on which means what, but I believe the higher the number the tighter the pattern. But take that with a grain of salt.
Notches on the Choke Tube Most standard choke tubes have notches on their ends. The notches can be used to identity your choke tube, but they can be difficult to see. The following list shows what kind of choke the number of notches designate: 1. One notch is a Full choke. (/) 2. Two notches is an Improved Modified choke (//) 3. Three notches is a Modified choke (///) 4. Four notches is an Improved…