How to make a gun fire like a shotgun?

I'm trying to make a gun fire three different bullets in a fashion similar to a shotgun, but I can't figure it out. What should I do to this script to get it to work?

local Tool = script.Parent

enabled = true

function fire(v)

	local vCharacter = Tool.Parent
	local vPlayer = game.Players:playerFromCharacter(vCharacter)
	local Torso = vCharacter.Torso
	local spawnPos = Torso.Position
	spawnPos = spawnPos + (v * 3)
	for i = 1,3 do
		local missile = Instance.new("Part")
		missile.Position = spawnPos
		missile.Size = Vector3.new(0.6,0.6,0.6)
		missile.Velocity = v * 300
		missile.BrickColor = BrickColor.new("Dark stone grey") 
		missile.Shape = "Ball" 
		missile.BottomSurface = "Smooth" 
		missile.TopSurface = "Smooth" 
		missile.Name = "Bullet" 
		missile.Elasticity = 0
		missile.Reflectance = 0
		missile.Friction = .9
		missile.Parent = game.Workspace
		local DmgScript = script.Parent.BulletDamage:Clone()
		DmgScript.Disabled = false
		DmgScript.Parent = missile
		local Delay = script.Parent.DelayedRemover:Clone()
		Delay.Disabled = false
		Delay.Parent = missile
		local force = Instance.new("BodyForce")
		force.force = Vector3.new(0,100,0)
		force.Parent = missile
	end
end

function onActivate()
	if enabled == true then
		enabled = false

		local character = Tool.Parent
		local humanoid = character.Humanoid


		local targetPos = humanoid.TargetPoint
		local lookAt = (targetPos - character.Head.Position).unit
		script.Parent.Handle.Sound:Play()
		fire(lookAt)
		wait(0.6)
		enabled = true
	end
end

script.Parent.Activated:connect(onActivate)

Simple, Just make about 6 parts, set their position to math.random(10,0,-5)

You can also do math.random(player.mouse.p)

I'll message you my gun script,It's to long to put in the Answers but here you go.