The MXT extension nut allows for installation of a Nordic Components MXT 12ga shotgun extension tube kit. The nut replaces the factory magazine cap, and is required for installation of the extension tube kit.
The BP-model nut is compatible with the following 12 gauge shotguns:
- Browning BPS (see note below)
- Browning Auto-5 (recoil operated version, not the current-production A5)
Certain models of the BPS, particularly older-production examples, will have a rolled lip at the end of the magazine tube. This need to either be removed completely or driven straight to allow proper function.
For the new production inertia-operated Browning A5, the NA5 nut is required.
Any magazine dimples or spring retaining devices will need to be smoothed or removed to allow proper function.
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.