I have spent many rounds (and hours) at the butt of various 870s, my favourite variety had 12-14inch barrels and fixed speed feed butts. I was only party to a conversation with some of my old team mates where we were recalling the day that I was in the front seat of a car with the 870 pointed into the back of the car and explaining to an individual at that the first hiccup I was going to put his head out the back window and onto the road (we were moving at the time).... this is why I like those shorter varieties, much handier in confined spaces...