Dig around on the internet. There is a forum for them, probably can get your questions answered there.
Try this to start:
http://www.bryco-jennings-jimenezarm...c6ce152029f64a
From my quick google searching that seems to be the hardest part of that thing.
This:
http://www.gunauction.com/buy/117196...9mm-(inv137432
Cracks me up.