My buddy talked to a guy at Indy that sold all sorts of receivers and he said that DoubleStar was the only one that he never had any trouble putting parts kits in. Then again, I am sure that because of the new name, he hasn't went through as many doublestars as he has other names. He bought it for a display so he wanted the least expensive one there.
We have one as a display model with a RRA 2-stage and an ACE stock. It seems to be off good quality. Uppers pin on it fine. I doubt that you would have any problems with it.
How much do you pay for a DoubleStar?
*edit* I can't believe that I forgot this part. My buddy says that underneath the pistol grip it is stamped CMT. That would be Continental Machine Tool, which do RRA and BM. So, what's in a name, moonbeam?[;)]