Well, if you see here
http://www.dengekionline.com/data/news/200...583fa4b475.html
The Arbalest is in smack in the middle of two Alter figures.
And here on famitsu
http://www.famitsu.com/anime/news/2007/08/...,76673,0,0.html
It's under the Alter section of the page
It's just like Max Factory. All they did were PVCs and surprise butt-secks, MaxGohkin Genesic GaoGaiGar. And considering that Alter and Max Factory are under the Goodsmile conglomorate, I think we can pretty much assured of quality.