My 20 gauge skeet barrels are marked 1610 KG, weigh 3 pounds eight ounces, my 30" 20 gauge step rib trap barrels are marked 1550 KG, weigh 3 pounds 5 ounces, my 32" 12 gauge step rib trap barrels are marked 1630. My 30" 20 gauge barrels may not be typical of Beretta 30" 20 gauge barrels. I don't know why the 28" skeet barrels weigh more than the 30" barrels. I assume it may be because the four barrel skeet sets were identical weight in all sizes. All these barrel sets are for the 12 gauge 682 frame. Sorry, my rare and wonderful custom made 20 gauge trap barrels are not for sale. I understand there are some of those in Europe but I've never seen another set in the U.S. They are not aftermarket barrels. They came on my 682 X Trap that was special ordered about 1986 or 1987.