Forget about it and wait. If you haven't heard anything after about 4 months, then give them a call. My advice would be to buy another gun you really want. By the time your love affair with the new gun starts to wear off, you will get your transfer.
I've been waiting for 2 stamps since both went pending on Oct. 31 last year. I call to check the status every other week and get the same answer: it will take around 6 months. I keep calling just in case.
Booker, stop wasting your time. Calling those people every week is like looking under the tree to see if the presents from Santa have arrived yet. The stamps will come. just wait.