How can I manipulate the left arm's position and rotation?

It's part of my one gun script I'm working on, but I forget how to change the rotation and position. Can anyone help me?

local LeftArm = Player.Character:FindFirstChild("Left Arm"):clone()
	LeftArm.Name = "Left Arm"
	LeftArm.Transparency = 0
LeftArm.CanCollide = false
LeftArm.TopSurface = 0
LeftArm.BottomSurface = 0