Honestly you will get a better deal on an RT Pro from Automags.org moderator Tunaman . If you dont mind stock parts, performance is the same.
Heres one on his website : Tunamart
But email him from his website or PM him from AO , the price will be much better than getting it off his site.
I have bought several markers from him. It sometimes takes him a few days to answer emails, he gets hundreds a day. So type in the subject line something that will catch his eye, like, "WTB a new RT Pro" or something like that.
The Tac One is a sweet one.
You will pay more from themagsmith.com because its all stock parts that have been modified or lightened. That = mo money .