M16 or Semi-auto SHotgun home defense?

https://www.youtube.com/watch?v=EzXiDt97yls&channel=GY6vids Looks like auto shotgun pretty impressive...to me. Though personally I like the http://www.waltherarms.com/products/tactical-rimfire-replicas/uzi-rifle/ https://www.youtube.com/watch?v=6a961wW1sc8&channel=bigdaddyhoffman1911 IWI Umarex 20+1 semi-auto UZI pistol at a fraction of the cost of the original http://www.gunsandammo.com/uncategorized/introducing-the-umarex-replica-uzi-in-22-lr/