Estes' mail order department is stocked with items and when an item is at zero, they show it 'out of stock'. This often just means that they have to wait for restocking from the warehouse. So if something is "out of stock", it may be back in shortly. They may be suffering from reduced staff like a lot of companies.

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Charles Russell, MSgt,USAF (ret.)
NAR 9790, Lvl 1
SAM "Balls Three"