I bought a Nordic Components +2 tube for my 930 SPX from Chris Patty at cpwsa.com. The package was labeled correctly, but the extension nut did not fit on the shotgun. The thread size wasn’t even close.
Thinking that maybe I had gotten one that was labeled incorrectly, I emailed Chris, who emailed Nordic Components almost immediately and asked them to send out a replacement. They sent it out the same day; great customer service from everybody! The replacement arrived Monday, and wouldn’t thread onto the 930 either. It was also labeled correctly, but was exactly the same as the first one.
My next step was to get a Mossberg 590A1 out of the safe. The extension is supposed to fit the 590, 930, and 935. If it didn’t fit the 590, then I’d know that I somehow got two packages that were labeled for Mossberg, but really aren’t. The extension fit the 590 with no problem.
Has anyone heard about the 930 SPX being different from other 930’s? The Choate tube that came with it obviously fits with no problem. I’m wondering if they changed the thread size to accomodate the Choate extension, so Choate could use a pre-existing part.
I sent an email to Grant at Nordic Components to see if he has any suggestions. I’ve seen several articles where people described using the Nordic tube and didn’t have any issues at all, so I’m at a complete loss as to what to do next.
I received an email from Tim Ubl, the Engineering Manager at Nordic Components, with his cell phone number, asking that I give him a call to discuss this.
Tim’s theory was that the magazine tube on the 930 was maybe a few thousandths over-sized, which was causing the Nordic nut to not fit. He suggested trying the nut from my 590 on the 930, and bet that it would fit. Meanwhile, he was going to go visit the local gunshop and try out some Mossbergs to see if something had changed.
I tried the nut from the Mossberg 5901A1 on the Mossberg 930 SPX, and it didn’t fit either. In fact, the fit was exactly like the Nordic nuts that wouldn’t fit. So clearly my 930 SPX is different. (I bought the Mossberg new off the shelf about a month ago, so I am the original owner.)
I had a weird idea in my head all day, and decided to give it a try. I took a Wilson extension off one of my Remingtons and tried it on the 930. It threaded on perfectly. The only hitch was that the Remington seems to only have roughly 3/8" of exposed thread on the shotgun’s magazine tube. The Mossberg has about twice that. So the Wilson extension couldn’t thread down far enough to tighten against the forend on the 930, but the threads were the same. I’m wondering if Mossberg got a better deal from Choate on Remington threaded extensions, so they changed the thread size on the magazine tube to accomodate them.
So it looks like a Remington nut will work, IF the threads are cut deep enough into the nut to be allow it to tighten against the forend. But I don’t know how far the threads extend into a Nordic nut for a Remington.
Tim said yesterday that they would make sure that I’m taken care of, even if it didn’t happen right away. I can’t say enough about the customer support from Nordic. I’m impressed. These guys have been great.
I sent him all the new information last night, and I’m waiting to hear back from him with his response to my discovery.
The problem is the 590 & 835 mag tube is a little smaller than the 930. A 590 tube extension won’t fit a 930 but a 930 tube extension will fit 590 & 835 shotguns. Also the distance from the top of the barrel ring and to the end of the mag tube is a little longer on the 930.
Nordic probably got 590 bases mixed up with 930 bases. They should make just one size base for the Mossberg shotguns, all 930 bases. Then the 930 bases will fit all of these shotguns: 590, 835, 9200, 930 & 935. Then only the tube that threads into the base will need to be different lengths.
Nordic should have been able to figure this out on their own. Tell the Engineering Manager this what I suggest should be done to solve the issue.
Nordic is quite capable of figuring it out on their own. I was the one wondering what the story was.
The guys at Nordic have been nothing short of terrific in their response to this. Tim Ubl, the Engineering Manager, is a great guy. He had already ordered a 930 tube from Mossberg the last time I talked to him, so that he could measure it. He’ll be producing new nuts within two to three weeks.
If you read any of several articles on the web, including the thorough review of the 930 SPX on Weapon Evolution, you’ll see that others have used the Nordic parts without any issues at all, and this was the first time Nordic had heard about a compatibility problem. Something must have changed recently on Mossberg’s side.
You can’t fix a problem until you’ve found out about it, and their response and customer service have been first rate.
You can’t fix a problem until you’ve found out about it, and their response and customer service have been first rate.
Go back and read my post I didn’t say anything about their products or customer service. I recommend their mag clamp to my customers all the time.
I only suggested what is probably the problem and how to fix it. That is what you are asking in your first post.
Tim’s theory was that the magazine tube on the 930 was maybe a few thousandths over-sized, which was causing the Nordic nut to not fit. He suggested trying the nut from my 590 on the 930, and bet that it would fit. Meanwhile, he was going to go visit the local gunshop and try out some Mossbergs to see if something had changed.
This is what I was responding to above.
I have already been down this road and faced some of the same problems with the tube extensions I make.