Some people have wondered if the gun was actually an air rifle or airsoft clone of the SIG 716. I think it is probably the real deal. Most companies outsource their warehousing and shipping to fulfilment houses. This kind of error was almost certainly made by the fulfilment house, not the TV merchant, not Amazon and not the gun store. In theory a rifle should be kept in a secure part of the fulfilment house. What must have happened is that this rifle got mixed up in another companies inventory outside the secure storage, either accidentally or on purpose (disgruntled employee?).
The BATFE is going to have a lot of fun with everyone involved.
[ Many thanks to Mr. Fahrenheit for emailing us the link. ]