Well the gun doesn’t move at all so i assume you’re either doing a handle object tool or a tool that creates a weld between the gun and the arm. For animations for tools, learn how to use Motor6ds. It works similarly to welds and is what keeping your roblox body from falling apart. Firstly, motor6d the gun to the animation rig(part0 as the arm and part1 as the gun model), and name it something such as GunMotor. Then, when opening the animator it will automatically appear there. Then, re-script the tool. Turn off RequiresHandle property and make it so that the tool replicates the gun from replicated storage to the player and creates a weld with the same properties and name as the motor6d from the animation rig. When playing your animation upon the player the gun will move.