Nordic Components MXT 2-shot extension tube spring and specific barrel nut.
The nut and the MXT extension replace the factory magazine cap and is required for installation.
The BR-model nut is compatible with the following 12-gauge shotguns:
- Benelli Nova and Supernova
- Beretta 1301 Competition and Tactical
- Beretta 391 Xtrema and Xtrema II
- Beretta A400 Xtreme and Xtreme Plus
- CZ 612, 712, and 912
- Weatherby SA-08
- Fabarm STF 12 – Will fit but a small gap will be left internally between the two magazine tubes.
Any magazine dimples or spring retaining devices will need to be smoothed or removed to allow proper function.