Stevens 520 double hump shotgun help needed

[tufenuf]

Ok folks not sure if this should be here but this is an oldie the variant was used in the war
I have a stevens model 520 shotgun and am having issues. Accurate info is hard as hell to find since there were a few different version.
mine is the double hump version and the trigger group is hard to find.

Problem is that once the trigger is pulled you cannot rack the action. The slide release needs to be pushed to unlock the action.

Have hear that the fore stock need to be pulled slightly forward to make work but that is a no go or that it is inertia driven action and need to be fired to do.

Im am looking for someone that has info on these guns or has one that can take pics of trigger group so i can compare.

I wanna use the gun dont want a wall hanger will post pics of gun and trigger group

any and all help is appreciated

 

[greyman441]

There is a spring inside the trigger mech that breaks. Very common with these guns, my 520 had the same problem. I dont have any pics of the trigger mech atm. Im gonna go back through my pics and see if i can find it. Mine works great now, just doesnt cycle very well.