MXT extension tube nut for certain Winchester, FN, and Browning autos (see list below). This nut will replace your factory magazine cap and allow installation of an MXT shotgun extension tube.
- Winchester SX2, SX3, and SX4
- FN SLP and SLP Mk. 1
- Browning Gold and Silver
NOTE: Due to mag catch issues, we do not recommend installing an extension longer than a +4 on the Browning Gold.