Best will the world here buddy but nearly 6lb / 3kg seems way to much for an STA to be different in weight unless it’s made of lead. I’d doubt a stainless one would weigh anymore than 1&1/2lb or 3/4kg. So I think you’ve seen a figure with some sort of weight included.I am surprised nobody has told OP to ditch the steel STA for a Carbon STA. $150 and drops 6 pounds from his rig.