I had one of Mel's origional rifles for a while and was very pleased with the action quality. He uses a differant material than that like what the big name makes use so its stronger and in all reality his action are probably storner than any factory despite being smaller.
You can get a SA rem down that light , a thin barrel , good carbod fiber stock of Hightech specialties (Bannser) is about 20 oz , use a set of one piece aluminum ring/base sets from Tally , and trim on the action some it woulden't be that hard to get a rifle down to 7lbs , thats without a scope though.