I let it go back in January or February, thought my stock class Phantom would be enough pump for me (to bad I suck at stock class).
The rail is a standard AM rail with the pump groove and a little flair I added mostly at the back end. Took my buddies mill to it and put an angle on it and used a few hand files to have it's lines match the Chords. On the underside the rear ASA screw holes were milled bye-bye and a ramped, split tail was made. The rough stuff was done on the mill, but all the detail work and polishing were done by hand - it came out really nice!