This coming Tuesday I'm picking up a new to me/used Mossberg 9200 semi auto 12ga. I'll post the obligatory pics when it's here. Today, the Choate 9 round mag extension tube, the TruGlo red dot and the Improved cylinder choke arrived. That conglomeration will give me a 9 + 1 semi auto zombie dispatcher. Edit: I picked it up today. I installed the extended mag tube and the red dot sight as well as the new choke.