EVER HAD A RAIL SYSTEM THAT WAS SO BADLY MADE THAT YOU CONSIDERED STUFFING IT UP YOUR OWN ARSE?
I have.
This Nuprol rail needed material removing from the upper portion so it could seat against the upper receiver & the lower section had no room to sit against the collar bolts & one of the screw holes for securing it to the upper section didn’t have threads…
Well done.