I recently purchased Winchester SXP defender and I'm adding some mods. Wondering if anyone has any knowledge of magazine extension tubes for this gun?? I have been reading and researching for days and not finding any magazine tube extensions made for this gun. Choate makes larger mag tube extensions for Winchester guns but nothing for the defender. Researching everywhere and every brand and coming up with dead ends. This morning I took my gun apart and measured exactly what I need to hit the end of my barrel and the capacity without the magazine spring holder would allow me 2 more shells with just over 3 in of magazine tube extension. I called Choate directly and custom-ordered the exact size with a fitting for Winchester SXP. Has anyone else had this issue??? If so what was your solution???