George: The ATF has ruled that only the owner may work on an 80% frame until it is functional (they used the test of able to fire a primer in the Maadi-Griffon case), once it can do that and the owner puts a serial number on it, it is treated as a normal firearm for purposes of gunsmithing. Obviously, a 1911 would not be able to ignite a primer without the frame rails done.
I'm probably going to take John's suggestion and do it by hand, I have a lot of spare time this summer and i would rather sit there and file away then burn out my drill press trying to cut the rails. I'll probably even make a jig out of the hardened plate, I could once, the plate and frame are clamped in place, run a drill bit thru the holes in the frame, and then bolt the plate to the frame. This way, if I bought more 80% frames, I could complete them easily.
Kharn
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