Run it
Copy the script and paste it into your executor.
local weapons = game:GetService("ReplicatedStorage").Weapons
for _, folder in ipairs(weapons:GetChildren()) do
if folder:IsA("Folder") then
local DoubleJump = folder:FindFirstChild("DoubleJump")
if not DoubleJump then
DoubleJump = Instance.new("NumberValue")
DoubleJump.Name = "DoubleJump"
DoubleJump.Value = 0.2 -- change to wtv u want
DoubleJump.Parent = folder
end
end
endA script that will let you double jump with every single guns in the game, open sourced no loadstring use it how you want

Universal