I'm going to guess that this came from the ad where you got your plane. Maybe it will help:
I have a new only flown twice, Beechcraft "MUSKEETER" 1/4 scale airplane, with a Saito 270 twin cylinder four stroke engine, with 5 Hitec ball bearing servos, and 2 JR std servos, no Rx or batterys, 96" w/s and is 74" long, This plane weighs 22 lbs ready to fly, SHOW QUALITY, AND FLYS SUPER
So 22lbs.