I can still get the bolt cover back on and it does cycle OK. The back of the receiver however does seem to have a slight concave shape to it. It looks like it was made that way but I will compare it to a FN that has not been KB. No use monkeying with it till I am sure. However bolt carrier sticks a tiny bit at the point where the dust cover slide sits when open. I have taken a caliper to the bolt carrier and it is bang on same width from end to end. The receiver does narrow by 2.5/1000 of an inch at the area above where the hammer sits in cocked position. My feeling is that a couple of very light taps with a brass drift at this point will solve the issue. I have ordered a new extractor and extractor holder (the originals could be straightened out in a pinch). The
SO once the crack in the stock is glued, it should be OK to fire in single mode.
SO once the crack in the stock is glued, it should be OK to fire in single mode.