Unless something has changed, they are made in Isreal by BUL Armory and roll-marked Magnum Research. In the past BUL has also made guns sold under Springfield Armory, Kimber, Charles Daly brands, though I think all of those guns were their old polymer framed 1911″A2″ style frames.
BUL has a small but strong and vocal proponent community that will tell you they are the best made 1911 under $1000. I have no personal experience with them, but would not hesitate to pick on up at the right price if it filled a need.