Thanks William. Will see what Mossberg says tomorrow. I have cleaned this about a dozen times now. I have the 930 JM Pro 22". Had it about 18 months, new. Just ordered your MST/CFR/ECF to see how that helps it. Also looking at ordering a Nordiccomp spring and tube. Any better spring you would...
Yesterday I had a lot of feeding issues. Thought all my problems were behind me, but they returned. I had cleaned the gun before taking it out. Last night I went to clean it and found a third ring when I removed the piston. Anyone have any ideas what and where this belongs? Calling Mossberg Monday