The 28 ga Beretta Xplor A400 with a 28" barrel weighs exactly 5# 8oz empty in stock form. It is turned into my favorite BC hunting shotgun and I've got some nice SxSs, O/Us and M12s to pick from in .410 thru 16 ga. I reload and use 7/8 oz of hard lead #6 shot, a BPI wad shot through the Modified choke for chukars, blues & sharptails. Sometimes open up to a skeet choke for early season ruffs.
For target use I bought a magazine cap assembly that comes with the A400 Xcel Black as it adds 3 or 4 oz to the overall weight...but never use the heavy cap hunting as you have 3 cartridges in the gun anyway. You can get them from Stoeger Canada, the Beretta importer and parts people, as well as various lengths of field sized MicroCore recoil pads that fit the gun perfectly and come in lengths from .4" to 1" in 0.2" increments.
The only drawback to the Xpor is that it flings the empty cases a long ways. Not a problem on our local skeet field but results in a lot of lost cases on the sporting clays ranges. Had it for over 2 years and would buy one again.