One ammo pack works but the other one doesnt??? [SOLVED]

Uhh so i made an ammo pack script for turbofusion guns, works perfectly with the sniper rifle i made. The problem here is that it doesnt work with other weapons.

Output

19:05:18.937 - Humanoid is not a valid member of Tool

19:05:18.938 - Stack Begin

19:05:18.938 - Script 'Workspace.ammopile_SMG.GiveAmmo', Line 6

19:05:18.939 - Stack End

Script

local ammoPickup = 30
local bundleType = "SMG"
local ammoLeft = 180
local canPickup = true
script.Parent.Touched:connect(function(hit)
    if hit.Parent.Humanoid then --checks if hit.parent has an humanoid item
        local find = hit.Parent:FindFirstChildOfClass("Tool") --if it has one, it searches for a tool that he currently uses
        if find then
            local find2 = find:FindFirstChild("AmmoType") --then if he does, checks if this item has the AmmoType stringvalue
            if find2 then
                local find3 = find:FindFirstChild("Gun_Main") --if it does again, it searches for the Gun_Main localscript to determine if the tool is actually a gun (works with turbofusion kit only for now)
                if find3 then
                    if find2.Value == bundleType then
                        local find4 = find2.Parent:FindFirstChild("StoredAmmo") --searches for the StoredAmmo intvalue
                        if find4 then
                            if ammoLeft > 1  and canPickup == true then
                                canPickup = false
                                script.Parent.PickupSound:Play()
                                find4.Value = find4.Value + ammoPickup
                                ammoLeft = ammoLeft - ammoPickup
                                wait(2)
                                canPickup = true
                            end
                        end 
                    end
                end
            end
        end
    end
end)

while true do
    wait(0.1)
    if ammoLeft < 0 then
        ammoLeft = 0
    end
end

Please, do you know what's causing this? i do get ammo when i use the sniper rifle, but it spams my console when i try with the SMG.