I have 2 870 12 gauges. Both of them are express models, one is standard 3" chamber 28" bbl the other a 3.5" chamber and a 26" bbl. Great guns, simple design, nothing to complain about really. There's one thing that 870s seem to need done to them when they're new, and that's a bit of a chamber honing. If you don't do that with the express models you might have a shell stick in the chamber once in awhile, and you could end up like me and break the rim off the shotshell trying to pull it out. Honing is as simple as taking one piece of a 3 piece cleaning rod (like you'd get in a cheap cleaning kit), putting a 20ga bore brush on it, and wrapping a little steel wool around that bore brush. Take your barrel off, fix the cleaning rod into a drill--then squirt some gun oil in the chamber and on the steel wool, and run the drill at high speed for about a minute going up and down a little bit in the chamber. After a couple times, switch to very fine steel wool and do it a couple more times, adding some gun oil while you go. You're chamber should become shiny and smooth as glass, eliminating shell-sticking! There's the trick with 870s