I tried this
tool.Equipped:Connect(function(mouse)
local RightShoulder = plr.Character.RightUpperArm
local LeftShoulder = plr.Character.LeftUpperArm
RightShoulder.C0 = RightShoulder.C0 * CFrame.Angles(0,0.6,0)
LeftShoulder.C0 = LeftShoulder.C0 * CFrame.Angles(0,-5,0)
end)
but it only says that C0 is no valid member of meshpart

1 comment
Because you have to look inside the character. It's inside the UpperTorso or something not sure though