How to make math.random more than 2?

I got this script online but it's only for 2 objects and I have 8 objects in ServerStorage.

math.randomseed(tick())
local random = math.random(1,100)
function onClick(plr)
	script.Disabled = true
	if random >=  1 or random <= 50 then
		local item = game.ServerStorage:FindFirstChild("AR")
		item:Clone().Parent = plr.Backpack
		
	elseif random >= 51 or random <= 100 then
		local item2 = game.ServerStorage:FindFirstChild("Crossbow")
		item2:Clone().Parent = plr.Backpack
	end
	script.Parent:Destroy()
end

script.Parent.ClickDetector.MouseClick:Connect(onClick)

I tried to solve it by doing this but it didn't work...

math.randomseed(tick())
local random = math.random(1,8)
function onClick(plr)
	script.Disabled = true
	if random == 1 then
		local item = game.ServerStorage:FindFirstChild("AR")
		item:Clone().Parent = plr.Backpack
		
	elseif random == 2  then
		local item2 = game.ServerStorage:FindFirstChild("Crossbow")
		item2:Clone().Parent = plr.Backpack
		
	elseif random == 3  then
		local item3 = game.ServerStorage:FindFirstChild("Grenade Launcher")
		item3:Clone().Parent = plr.Backpack
		
	elseif random == 4  then
		local item4 = game.ServerStorage:FindFirstChild("Pistol")
		item4:Clone().Parent = plr.Backpack
		
	elseif random == 5  then
		local item5 = game.ServerStorage:FindFirstChild("Railgun")
		item5:Clone().Parent = plr.Backpack	
		
	elseif random == 6  then
		local item6 = game.ServerStorage:FindFirstChild("Rocket Launcher")
		item6:Clone().Parent = plr.Backpack

	elseif random == 7  then
		local item7 = game.ServerStorage:FindFirstChild("Shotgun")
		item7:Clone().Parent = plr.Backpack
		
	elseif random == 8  then
		local item8 = game.ServerStorage:FindFirstChild("Sniper")
		item8:Clone().Parent = plr.Backpack
	end
	script.Parent:Destroy()
end

script.Parent.ClickDetector.MouseClick:Connect(onClick)

Please help, thank you! <3