Mine is a full metal upper/lower. See photo below to see just what happened - as i said, an extremely clean break the same footprint of the aimpoint mount (which came out of the experience unscathed.)
Affliction: Thank you for the kind offer - I'll take it into consideration. I am handy .. but not countersunk screw holes handy.
It's just seems a shame to have to buy a complete upper assembly, only to pull the rail off of it..
