The Kinetic Research Group T-Slot Weight slides inside the T-slot on the KRG Whiskey-3, X-ray, and Bravo chassis. It's sole function is to increase the weight of your rifle in order to mitigate recoil and allow easier impact spotting and a quicker followup shot. FeaturesFits: Whiskey-3 Chassis (all gens), all X-ray, all Bravo ChassisIs not compatible with our Enclosed Forend or the TAC338 Whiskey-3 chassisMaterial: Steel with nitride finish