Mossberg 500 locked up

S

samsmix

New member
I have a "Western Field 550" aka a Mossberg 3" magnum pump that has a severe problem: when the gun is fired, the action does not unlock. I can open the gun by pressing the slide release, but cannot simply rack the action and continue firing. I know it isnt the ammo, because it happens even when the gun is empty.

Any thoughts on what could be causing this?
 
Now is the time for a really deep cleaning. The trigger group out and cleaned.

After a complete cleaning and the problem is still there then start looking for worn parts.
 
I've not torn the trigger group apart, but I have hosed it out with carb cleaner and lubed it. Can't see any obvious wear. Has anyone experienced this isuue before?
 
Thanks g.wilikers. I was discovering that this morning, using my daughter's 20ga trigger group for a reference. I still cannot see the part causing the trouble, but it is clearly the lock lever that is holding it shut, failing to depress when the trigger is pulled.
 
I had to take a break to go shoot my antelope, but I'm back into this. I cannot see any broken or worn parts. A thorough cleaning has been done. Does anyone have any more clues?
 
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