How do i position the gun shell?

So when i shoot my gun i want a shell to come out this shell spawns at 0,0,0 and it clones to workspace but i want it to drop from the gun to the ground i have already tryed position it heres the code.

This is the function where the shells meant to come out

local y = game.Workspace
local    z = game.ServerStorage["DeagleShell"]
    z:Clone().Parent = y


z.Position = Vector3.new(script.Parent.Barrel)
	
			end

May someone help me fix this please heres a screen shot of where they spawn when i shoot

http://prntscr.com/f15rbl

And then they stack ontop of the second shell

http://prntscr.com/f15saq

May someone Help me thanks!

local y = game.Workspace
local    z = game.ServerStorage["DeagleShell"]
    z:Clone().Parent = y


z.CFrame = script.Parent.Barrel.CFrame

            end