Some Pics? lol...
Kar98 weighs about 7.4 lbs
Magazine weighs approx. 1.6 lbs
Magnet test shows mix of Steel and I guess "Aluminum?"
Outer Barrel, Mag Catch, Rear Sight, Fake cleaning rod, Trigger are NOT Steel I guess...
Some weak magnetic pull can be detected around the bolt itself, so I'm guessing inside it may be Steel...
Front Sight is Steel, Metal Butt is steel...
Magazine, only the BB area is steel, and some weak magnetic pull can be felt on the side of the mag, which may be the tube where the CO2 travels...
Chromy thing you see on the bolt in the pics seems to be just some paint on either cheap metal, or maybe even plastic lol... But that part I think is just for looks.