My grandson has a youth model 1100 20 guage. He took it apart to clean. The rubber o-ring got damaged so he got a couple on e-bay.
Now the gun will not cycle and load another shell. He's shot about 6 boxes of target loads with no problem, before. I had him shoot a slug today and it worked fine. I checked to be sure the piston, collar and o-ring were in proper sequence. The only other thing I can think of is the action spring in the butt stock may be the problem.
BUT, cannot remove whatever is holding that spring. there's like a big screw but it wont budge. Anyone know how to remove this. PM's are OK. Thanks.