UPDATE: This script is currently useless. Walmart has re-enabled the stock checking feature. I'm leaving it up as a starting point in case the feature were ever disabled again in the future.
Walmart has taken to blocking whether some items, such as ammunition, are in stock on their website. This script will unblock any hidden stock status, so that you can check whether these items are reported to be in stock. Warning: Results may not be accurate. Online inventory check was disabled in the first place because items were selling out too fast for the check to be deemed accurate.