Steve,
I just took the sight out of the one 96 I have that still has one of these
to have a look at it.
The tab at the rear goes in further than the tab at the front (it doesn’t catch much).
The way I got it back in was to first cut a VERY small bevel on the bottom of the front tab, fed the back tab in as far as i could get it, then put the blade of a jewelers screwdriver between the front of the tab and the slot, and kinda’ pried back and pushed down at the same time, and it snapped right in place.
Note: I never realized how loosely these things fit when installed, this probably explains at least part of the accuracy issues I’ve had with this gun. (the last one I built got a homemade fiber-optic sight and it works just fine)
When I get around to it I’m going to do this again and reinstall it with some e-6000 adhesive to eliminate the movement…even if the tab breaks off next time that stuff will still hold it.
Good luck !
Rex