I am looking for suggestions for a new shotgun. I began hunting with a group that pushes deer through thick scrub oak and scrub pine. Shots are fairly close. I own a remington 870 with a 26" barrel and only a front bead. I am looking for something with a shorter barrel that is easy to swing in the thick growth. Barrel no longer than 24", preferably 20"-24". I would prefer a semi auto and composite stock. It would need to have sights, or maybe just holes tapped for some type of red dot sight. I will be shooting mostly buckshot. I would like to buy a shotgun that has all the features I want out of the box. Any suggestions?