The Nordic Components SX-12 Winchester/FN 12GA Shotgun Barrel Nut (NUT-SX-12-00) allows for the installation of an MXT extension tube kit and replaces the factory magazine cap.

Compatible 12GA Shotguns:

• Winchester SX2, SX3, and SX4
• FN SLP and SLP Mk. 1
• Browning Gold – Note: Due to issues with excessive magazine spring tension, we do not recommend an extension longer than +4 for this shotgun.
• Browning Silver

Note: Magazine dimples or spring retaining devices, if present, need to be smoothed or removed to allow proper function.