Just a heads up, older Beretta 28ga 686 guns were built on 20ga frames, but that changed a few years ago and they are now built on a true 28ga frame. These guns should weigh a little less than 6 pounds and have really nice balance. Another good option I would suggest is the FAIR SLX600 Deluxe. They're good guns that are built on a 28ga frames and you can get a new one for around $1,500.00. The rumor is that FAIR builds the 28ga and 16ga Franchi Instincts, but I'm not sure if that has been 100% confirmed. I love lightweight guns, but a 5.5lb barrel heavy O/U is not the easiest gun to shoot. If you can find one that's a little under 6lbs that is built on a 28ga frame then it will balance much better that the alloy frame guns that I've picked up.