^^^^^More then the holiday's are going on right now. The demand for not only the mags but, all of the parts and rifles they make.
Delton is a good company and under "Normal" conditions they would have been prompt in returning your call.
The same can be said for most if not all of the AR manufactures at this time.
They don't have the people to deal with the panic buying going on.
NRA Life Member, SAF Member