Turn off it’s requires handle property, and if your gun is already rigged correctly then make it so that whenever it’s equipped a motor6d attaches the handle to the players torso
I’ve found the solution, For people that want to use ChildOfConstraint on roblox, weld whatever u want to use with the constraint to the HumanoidRootPart, in blender then parent it to the HRP. But thank u anyways Mars