USED Nordic Components Shotgun Extension Tube Nut Benelli Nova CZ 720 Weatherby SA-08 Mossberg SA-20 Matte Black 20ga EDEMO1 Used. These Shotgun Magazine Extensions from Nordic Components replace your factory magazine cap to allow for the addition of an extension tube. Please note that in order to install this Nordic Components 12ga Shotgun Extension Nut you'll need to smooth or remove mag dimples or spring retainers for a proper fit. Get the Nordic Components Shotgun MXT Extension Nut to ensure your extension tube kit is secured and ready for action. Specifications for Nordic Components Shotgun Extension Tube Nut Benelli Nova/SuperNova Beretta 1301/391 Xtrema/391 Xtrema II/Tx4/A400/A400 Xtreme CZ 712/912 Weatherby: Manufacturer: Nordic Components Color: Matte Black Magazine Capacity: 0 Round Features of Nordic Components Shotgun Extension Tube Nut: Required for installation of the extension tube kit Replaces the factory magazine cap Any magazine dimples or spring retaining devices will need to be smoothed or removed to allow proper function Package Contents: Nordic Components Shotgun Extension Tube Nut What firearm models does the manufacturer say Nordic Components Shotgun Extension Tube Nut Benelli Nova/SuperNova Beretta 1301/391 Xtrema/391 Xtrema II/Tx4/A400/A400 Xtreme CZ 712/912 Weatherby is compatible with? The manufacturer says that Nordic Components Shotgun Extension Tube Nut Benelli Nova/SuperNova Beretta 1301/391 Xtrema/391 Xtrema II/Tx4/A400/A400 Xtreme CZ 712/912 Weatherby is compatible with Mossberg SA-20 CZ 720 Stoeger M3K Stoeger M3000 Stoeger M3500 Franchi Intensity Franchi Affinity Franchi I-12 Stoeger Model 2000 Beretta 1301 Mossberg Model 930 Mossberg Model 590 Mossberg Model 835 Mossberg Model 935 Benelli SuperNova Benelli Nova Beretta Tx4 Storm Weatherby SA-08 Beretta A400 Xtreme Beretta A391 Xtrema IINordic Components NUT-BR-20-00: Shotgun Extension Tube Nut Benelli Nova CZ 720 Weatherby SA-08 Mossberg SA-20 Matte Black 20ga Condition Like New Inspect and Rebox