According to AGM the Rattler TS50-640 thermal weight in at 1.33 lbs. I am not sure if that is with or without the mount...
I do know that I just weighed my 16" MPR rig with the Rattler and OCL Hydrogen-S 7.62 on the end with the thermal wrap on the can (dry weight - no ammo) was totaling an extremely light and nimble 10 lbs. 14.55 oz. So we'll say 10 lbs. 15 oz to keep things simple. In-hand, this thing feels like it weighs the same as it did before I ever put a scope on it new. It balances really well, and I'm very happy with the feel and balance of it.
I do know that I just weighed my 16" MPR rig with the Rattler and OCL Hydrogen-S 7.62 on the end with the thermal wrap on the can (dry weight - no ammo) was totaling an extremely light and nimble 10 lbs. 14.55 oz. So we'll say 10 lbs. 15 oz to keep things simple. In-hand, this thing feels like it weighs the same as it did before I ever put a scope on it new. It balances really well, and I'm very happy with the feel and balance of it.