If you can't cock it, probably a pretty simple fix. Maybe as simple as the power-adjustment/hammer-spring adjuster simply adjusted too far in. Or could be the hammer-spring kinked or broken. Regardless, sounds like possibly a simple fix.
Although I haven't gone into the valve-works of a Falcon FN, getting into it that far is very straightforward. I won't try to keyboard it, but if you call me with pistol and tools in hand I'm happy to explain how to get into where I think we need to go.
Let's do this!
Ron
254-253-1239
View attachment 533153 View attachment 533154