Where can I find the constrictions or dimensions on my Beretta choke tubes?

Beretta 12 gauge. shotguns are offered with either the Mobilchoke or Optima-Choke tube systems.  20, 28 and 410 gauges are only offered in Mobilchoke. The following chart lists the nominal inside diameters for both types of 12 gauge chokes.

Please note that variations will exist due to engineering and machining tolerances.  There are many factors that determine how each choke will pattern. The measured internal diameter is only one factor, we supply these charts for a general comparison use only. It is always best to pattern your firearm, with the choke and the type or brand of shot shell you will actually use in order to determine the optimal combination. These measurements are supplied only as a guide -  Remember, it is not the actual internal dimension that is important, but how well the choke patterns for your particular needs.

Please contact your local Beretta dealer for additional assistance and to purchase your choke tubes. You can also purchase your choke tubes from Beretta.