Character morph cant copy specific part

Help and Feedback Code Review
#1 

local pad = script.Parent
local gamestrog = game:GetService("ServerStorage")
local oyuncular = game.Players
local dosya = gamestrog:WaitForChild("Kurban")
local kurbanbicak = dosya:WaitForChild("Bicakli")

local choose = true

local function morphdonus(hit)
	local plr = oyuncular:GetPlayerFromCharacter(hit.Parent)
	if plr and choose then
		choose = false
		local eskichar = plr.Character 
		local yenicar = kurbanbicak:Clone()
		plr.Character = yenicar

		local kurbanroot = yenicar:FindFirstChild("HumanoidRootPart")
		local oyuncuroot = eskichar:FindFirstChild("HumanoidRootPart")

		kurbanroot.CFrame = oyuncuroot.CFrame

		yenicar.Parent = game.Workspace
		eskichar:Destroy()
	end
end

pad.Touched:Connect(morphdonus)

–The issue is. Cant copy the mesh in Bicakli>Right Arm>FakeKnife>Hitbox