I brought it in an weighed it at work. It came in at 5.1oz. That's within specs, I was looking for anything under 5.5, that way I figured it would have enough glide to land and should get launched on a small diameter prop. It's not record setting weight by any means, but not bad as I covered it in plain old Ultracote. Hey when you're building with 1/16" and 1/32" the covering is 30% of the engineered structure