Os 46 fx kit built Last time i weighed it it was right at 4 1/2 pounds. But that was a little glue and packing tape earlier! HE HE It seems to like the MA 11-5 plastic prop the best. Stock muffler with baffle removerd. Plenty of power to pull out of a hover. The arfs are very nice. Two of my buddies have them with the 46 fx and they love them. I don't care for the trim scheme on the arf though.