I hung four Wilson Combat/Scattergun Tech +2 extensions on Dept-owned 870s and I was really impressed with the sturdiness of the mount and the quality of springs/followers.
Once finished, I ran a 100 pack of bird loads through them as fast as I could rack 'em through, The positive manner in which they fed shells was comforting at that speed and I came away convinced the setup was worthy for a duty shotgun.
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