Weight is exactly 6.2 pounds without magazine and 6.63lbs with unloaded magazine.

Hi Frank, The weight without the magazine is 6.2 pounds.

Frank here are the specs hope they help. Specifications:
Caliber : 5.56 / .223
Action : Semi-Automatic
Magazine Capacity : 1-30 round
Overall Length : 32 ½”, 36 1/8” Extended
Extended Barrel Length : 16” M4 Contour
Rifling : 1-8 Twist
Weight w/o Magazine : 6.2 lbs.
Receiver : Forged 7075-T6
Front Sight : Optic Ready
Butt Stock : A2
Grip : A2
Forearm : A2 Hand Guard
Flash Hider : A2