Hi David,
The only way to know exactly what a particular gun weighs is to weigh it. The density of the wood, especially highly figured wood can make quite a difference. A more important question might be why does your friend want a very lightweight gun? If he wants to carry it a lot and shoot it a little, light is OK. If he wants to shoot it a lot such as several rounds of skeet at a session or 200 sporting clays in one day, he'll quickly learn to hate the gun. There is a high price to pay, in terms of recoil, for choosing a very lightweight 12 ga.
