Uniform Equiper

[LoveTheBears101]

Finally got it to work!!

Note: I made the part the player walks through visible for presentation purposes
You can get it here:

Uniform Switcher - Roblox

How to use
Inside of the part, you will see a shirt and pants. Change the ShirtId and PantsId of shirts and pants to the id you would like to use.

Once you did that, it should work!

This entire thing is open-sourced, the code is here:

local door = script.Parent

local shirtId = script.Parent.Shirt
local pantsId = script.Parent.Pants

local shirt = nil
local pants = nil

local givenPlayers = {}

function touched(part)
	if part.Parent:FindFirstChild("Humanoid") == nil then
		return
	end
	
	if #givenPlayers ~= 0 then
		for index = 1, #givenPlayers do
			if givenPlayers[index] == part.Parent.Name then
				return
			end
		end
	end
	
	shirt = part.Parent:FindFirstChildOfClass("Shirt")
	if shirt ~= nil then
		shirt:Destroy()
	end
	
	shirt = script.Parent.Shirt:Clone()
	shirt.Parent = part.Parent
	
	pants = part.Parent:FindFirstChildOfClass("Pants")
	if pants ~= nil then
		pants:Destroy()
	end
	
	pants = script.Parent.Pants:Clone()
	pants.Parent = part.Parent
	
	print("Gave uniform to " .. tostring(part.Parent.Name) .. "!")
	
	givenPlayers[#givenPlayers + 1] = part.Parent.Name
end

door.Touched:Connect(touched)