If you’re looking for more capacity, this extension nut is half the equation, allowing installation of a Nordic Components 20ga shotgun extension tube kit on your Benelli semi-auto. The nut is required for installation of the tube kit.
The 20 gauge Benelli extension nut is compatible with 20 gauge Benelli M1 and M2 and 20 gauge SBE 3 autoloading shotguns and installs in place of the factory magazine cap. Also fits the Franchi Affinity 20 Gauge shotgun. Some Affinity models will need the opening on the end of the forearm modified for the nut to fit inside it.
Note: The 20 gauge Benelli extension nut will also be compatible with other shotguns utilizing the same factory magazine thread pattern, but may require modification/fabrication for proper installation. Visit the shotgun extension fit guide for information on other shotgun models.