How would I get the players arms with out cancelling the animations?

Help and Feedback Scripting Support
1

As I am currently making and fps game.
I need the players arms to point towards the mouse.
BUT! It’s cancelling out the animation.
How do I do this?

local Camera = workspace.CurrentCamera
local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()

local char = Player.Character or Player.CharacterAdded:Wait()
local Root = char:WaitForChild("HumanoidRootPart")
local RunService = game:GetService("RunService")

local CN,CA = CFrame.new,CFrame.Angles
local an = math.asin

local armOffset = char.Torso.CFrame:Inverse() * char["Left Arm"].CFrame


local armWeld = Instance.new("Weld")
armWeld.Part0 = char.Torso
armWeld.Part1 = char["Left Arm"]
armWeld.Parent = char

RunService.Heartbeat:Connect(function()
	local cframe = CN(char.Torso.Position, Mouse.Hit.Position) * CA(math.pi/2, 0, 0)
	armWeld.C0 = armOffset * char.Torso.CFrame:toObjectSpace(cframe) * CN(0,0,-0.5)
end)
2

point the character in the direction rather than just the arms.
If you need to move the arms specifically then

What is this doing?
The cframe.new constructor you are using already gives an angle to it.
I think that it is getting rid of the x,y rotation of the mouse but why are you using pi/2?

3

I have no idea how to point the mouse towards the mouse.
Can you explain how to do this?