Can't comment on the factory factor in Jeff's case. However, I just had the occasion to weigh an all-original Flues Field Grade 20ga w/ejectors, 1919 vintage. Just over 6# with 28" barrels; factory marked F/F, and my bore and choke gauge confirmed that it hadn't been messed with. The ejector mechanism must add a few ounces to those. The forend certainly feels on the heavy side, compared to extractor Ithacas.