How to make a gun make bullet holes?

I am currently working on a pistol, and I'm wondering on how I can add a bullet hole portion to this script. Basically, it'll make a bullet hole wherever the bullet hits on impact, except for parts within humanoid models, which will be another texture. If someone can help me, it'd be a lot of help. Thanks!

Tool = script.Parent



colors = {26,}



function fire(v)

if (script.Parent.AmmoScript.Clip.Value == 0) then return 
	end 
	script.Parent.AmmoScript.Clip.Value = script.Parent.AmmoScript.Clip.Value - 1
	print(Ammo)



	Tool.Handle.Fire:play()
Tool.Parent.Torso:findFirstChild("Right Shoulder").CurrentAngle = 2
	



	local vCharacter = Tool.Parent

	local vPlayer = game.Players:playerFromCharacter(vCharacter)



	local missile = Instance.new("Part")




        



	local spawnPos = vCharacter.PrimaryPart.Position

	





	spawnPos  = spawnPos + (v * 8)



	missile.Position = spawnPos

	missile.Size = Vector3.new(1,1,1)

	missile.Velocity = v * 200 + Vector3.new(math.random(-1,0),math.random(-1,0),math.random(-1,0))

	missile.BrickColor = BrickColor.new(colors[math.random(1, #colors)])

	missile.Shape = 0.5

	missile.BottomSurface = 0

	missile.TopSurface = 0

	missile.Name = "Bullet"

	missile.Elasticity = 0

	missile.Reflectance = .1

	missile.Friction = .3




	local force = Instance.new("BodyForce")

	force.force = Vector3.new(0,100,0)

	force.Parent = missile

	

	Tool.BrickCleanup:clone().Parent = missile

local new_mesh = script.Parent.Bullet:clone()
	new_mesh.Parent = missile


	local new_script = script.Parent.Paintball:clone()

	new_script.Disabled = false

	new_script.Parent = missile


	local creator_tag = Instance.new("ObjectValue")

	creator_tag.Value = vPlayer

	creator_tag.Name = "creator"

	creator_tag.Parent = missile

	





	missile.Parent = game.Workspace



end







Tool.Enabled = true

function onActivated()



	if not Tool.Enabled then

		return

	end



	Tool.Enabled = false

	local character = Tool.Parent;

	local humanoid = character.Humanoid

	if humanoid == nil then

		print("Humanoid not found")

		return 

	end



	local targetPos = humanoid.TargetPoint

	local lookAt = (targetPos - character.Head.Position).unit



	fire(lookAt)



	wait(0.15)



	Tool.Enabled = true

end





script.Parent.Activated:connect(onActivated)

Ew, why are you using parts for a pistol bullet? Please use raycasting, it is much better. Also can't you just create a part where the bullet hit?