Raising left arm(for dual welds)?

so basically, i want to add dual welding weps, and so far ive managed to clone the handle, but now i need the left arm to raise, any ideas? Also, i tried making a script that raising the arm when equiped, but i think i failed massively haha, any help would be appreciated

Tool = script.Parent

function Equip(mouse)
    local arm = Tool.Parent["Left Arm"]
    arm.C1 =  CFrame.new(-1.5, 0.5, 0.5) * CFrame.fromEulerAnglesXYZ(math.rad(-90), math.rad(0), 0)
end

function Unequip(mouse)
    --do the opposite maybe?
end
Tool.Equipped:connect(Equip)
Tool.Unequipped:connect(Unequip)