Nordic MXT Winchester SX3/SX4 12 Ga Extension Nut

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.  
Fits: 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.