The answer is probably but not definitely. I have a set of Briley extended chokes for my Beretta o/u that fit perfectly. The same chokes backed out of a Beretta 390 and would not fit into a 687 owned by a friend who'd forgotten his chokes on a sporting clays shoot.
The moral of the story is to try after market chokes in the gun you plan to use them in before buying them.
Paul
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