This extension nut allows for installation of a Nordic Components 20ga shotgun extension tube kit. The nut is required for installation of the extension tube kit.
The BN-model nut is compatible with 20 gauge Benelli M1 and M2 autoloading shotguns. This nut replaces the factory magazine cap.
Note: This nut will also be compatible with other shotguns utilizing the same factory magazine thread pattern, but may require modification/fabrication for proper installation. Nordic Components does not have specific information regarding compatibility beyond the models listed in this description