the 1100 is based on the 870, many interchangeable parts.Im partial to my 870 Wingmaster 20 gauge pump for sentimental reasons. Christmas present from Dad when I was 9. Amazing, proper gun training and I've never hurt myself or anyone else even though I had it in MY gun safe from day one, and its nick free and stock is as shiny as the day I bought it, thousands of rounds later.
I'd take this with me long before I would grab any of my 223s, even the "scary" black ones, for clearing the home of intruders, or any other building for that matter.