- Compatible with FNH SLP, Winchester SX2, SX3 shotguns in 12 gauge only.
- One-piece design for superior strength
- Includes RCI high capacity follower and spring.
- Allows shotgun to hold up to nine 2-3/4" shells
- Tube diameter: 1.125"
- All extension tube assemblies come with an oversize magazine tube spring that must be trimmed to the appropriate length for the selected tube size. With the tube installed on the gun and end cap removed, insert the magazine tube follower and spring. For proper spring tension and cycling, trim the spring's length so that no less than 12" of it is exposed from the end of the extension tube with the end cap removed.