I don't know about the BPS, unless it has the same threads as some other guns.
SRM Performance makes one that will fit the Browning Gold.
The problem is, modern Browning shotguns are specifically aimed at sportsmen, and their guns are more high-end.
Not the type of gun people want to turn into defense guns, so no one ever made extensions.
You might email Choate and ask them if they offer a model that would fit.
They make more types than anyone else.
They're good about answering emails, usually by a Choate family member.
