OsteKuste
.22LR
While doing a routine cleaning I was reassembling my 930, and while I was sliding the barrel on I felt it catch a little. I gave it the little wiggle that usually seats it, and it dropped in. However, a small thin little split ring only about a couple mm thick popped out the top of the barrel lug. It is as I said only a couple mm tall, split, and has no really noticeable chamfer on either top or bottom. It is sized so that it slides perfectly over the mag tube. The only reference to this I have found is one other member who had this issue and seemed to track down where it went by looking at another barrel, which showed that it went into a small groove just under the heavy main gas spring. Mine also has this groove, and I can place this ring into it but it will not really fit very tight. I have to keep my finger on it till I slide the barrel down far enough that the mag tube passes it. I then finished assembling it, ran the action a few times, and disassembled it again. At this point when I removed the piston this small mystery ring found its way down onto the top of the piston/gas ring assembly. So, what the heck is this thing, where did it come from, and how do I get it back in its home? Am I putting it where it goes? Here's the kicker. I called and spoke to a Mossberg service tech, and after describing this issue they stated that this little ring was supposed to stay somewhere inside the barrel lug. It was not supposed to come out, but they couldn't tell me how it came out or really where it should be exactly or what it was. They only stated that I would have to send my barrel back for service. This is a brand new SPX of recent manufacture with less than 100 rds fired, and this does not make me happy, especially since the tech couldn't really tell me any details including how to keep this from happening again. I'm not really sure they were understanding the issue. If this ring does go where it seems to fit into that groove, I don't see what keeps it there anyway. I don't see it referenced in any dissassmbly video or diagram. Please help! So far I love this gun, but this has not built any confidence for sure!