Airsporter action moving in stock foreend

[trajectory]

Not sure if this helps or not but I think I'd take the stock off & have a look at the bracket & stud it fits on. I'd wonder if the bracket had too large a clearance hole & it allowed the bracket to move too much on the stud, or maybe its bent. I'd also have a look at a parts diagram to see if it needs a locking washer on it & maybe consider a new one too. I'm guessing the bracket is put on fairly firmly first, then the front stock screws alignment checked, the stock removed & then the bracket tightened properly then stock back on & front screws in if it is still aligned ok. The stock fit alignment check should be done with the rear bolt done up as it could well pull the whole action back when done.
As I say not too sure about this. I dont think I'd like to try firing it with anything loose. It will be interesting to see what others think but I'd be rather cautious.

[look no hands]

The mounting bracket has a slot for the bolt so it can be adjusted for the side mounting screws, as said above, put the action in the stock and do up the rear stock bolt, make sure the mounting bracket is a little lose and then adjust the bracket so that the mounting holes in the stock line up with the threaded holes, put your screws in and then you should be able to tighten up the mounting bracket bolt with some pliers through the cocking slot of the stock (obviously cock the underlever first, make sure the hook part of the bolt is facing forward (and backwards), hopefully the underlever will then click onto the hooks, I have had it before that the hooks have been to far forward that you can't get the push button to disengage from the hook.