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Mossberg 590 Pump Action Mag Tubes: Extensions and Springs

Re: 590A1 18.5 mag extension.

Tony617! said:
I took my 590A1 to the gun range today as I wanted fire it with my new S&J magazine extension. I pulled my 590A1 out of HD duty until I had a chance to take it to the range. I fired 70 rounds with a mix of #4 buckshot and 00 buckshot. No problems so I'm using the 590A1 for HD again.
good to hear!
 
Ok call me dumb or whatever. I ordered a wolff spring friday and to my amazement it was delivered today. I only ordered quantity 1 spring for 8.99...pack of 1 spring.

I swear there are 3 springs in this pack or is one spring supposed to look like this??

6A857548-A294-4101-9CC2-AEA9582AEBB0-56775-000019E3A32EE121_zps890430d8.jpg

1FE9F54F-5AE2-45B8-80F4-16D3BD2C652C-56775-000019E98EAC2B75_zpsa3dd21c1.jpg
 
Re: Mossberg 590 Pump Action Mag Tubes: Extensions and Sprin

Not to be captain obvious but.... Open it and find out dude..

Sent from my Nexus 4 using Tapatalk 2
 
jimmycrackcorn said:
Not to be captain obvious but.... Open it and find out dude..

Sent from my Nexus 4 using Tapatalk 2

Hahaha....I guess my edit to that post didnt save. I did open it and I was able to separate them.

Im new to shotguns. I only shot one years ago maybe 10 times on a short shooting trip. So I am totally unaware of what the spring looks like in that tube. I had myself second guessing the person who stapled that freakin tag on the bag. I was like no way...really...this spring goes in that tube. The tag says 1 spring...ok really.

I dont even have my shotgun yet. I pick it up tomorrow morning if everything goes as planned.
 
Ok call me dumb or whatever. I ordered a wolff spring friday and to my amazement it was delivered today. I only ordered quantity 1 spring for 8.99...pack of 1 spring.

I swear there are 3 springs in this pack or is one spring supposed to look like this??

6A857548-A294-4101-9CC2-AEA9582AEBB0-56775-000019E3A32EE121_zps890430d8.jpg

1FE9F54F-5AE2-45B8-80F4-16D3BD2C652C-56775-000019E98EAC2B75_zpsa3dd21c1.jpg
So did the spring end up working out pretry good for u??
 
Hello all. I recently purchased a NIB 590A1 18" with GRS and standard speedfeed stock and I love it. I just ordered a GG&G front sling plate (for HK hooks).

As to the front plate, I plan on buying a S&J +2 mag extension. Will the GG&G front plate interfere with it? The sling plate the S&J comes with will be removed. That leads me to another question. How do you remove the S&J plate or does it come seporate?

There are some great 590s on here and lots of great info. Many thanks. :)
 
Welcome aboard!

The S&J parts come loose in a bag. I didn't use mine but don't recall removing it either. The S&J extension is a top quality part that looks like it came from Mossberg that way. Don't forget to post some pics!
 
Re: 590A1 18.5 mag extension.

I would wait. The S&J extension is all steel construction while the choate has a plastic end cap that bothered the crap out of me. It is the only thing holding everything in. S&J machine work is top notch, this is coming from a fellow machinist. also with the S&J the sling mount built in while the choate uses a stamped clamp mount that comes loose under recoil. Choate makes a decent extension for the money but S&J hardware is superior. They offer a discount for website members I believe it's 5%.

So I waited for S&J hardware to get them back in stock an you are right it was worth it. I just got it in today and got it installed I now have my holy grail of shotguns thanks for all the help!

 
I just recd my S&J +2 ext for my 18.5 590A1. It came with a new spring too, but no lime green follower. After installing, I couldn't fit 7 shells. Shortened the spring and still can not get the 7th shell to fit. Completely removed the spring an still can't fit all 7. I must be missing something..? Any thoughts? Using 2.75 inch shells and I did remove the factory plastic stopper. Thanks!
 
Welcome to the forum from NY. Sorry to hear you're having a problem.
What brand shells you using? Some are longer than others. Just a thought.
 
Thanks! Been lurking for months, and figured nows the time to get some advice. I have a few brands at home so I will compare them tonight, and try again with the shortest shells.
 
I just recd my S&J +2 ext for my 18.5 590A1. It came with a new spring too, but no lime green follower. After installing, I couldn't fit 7 shells. Shortened the spring and still can not get the 7th shell to fit. Completely removed the spring an still can't fit all 7. I must be missing something..? Any thoughts? Using 2.75 inch shells and I did remove the factory plastic stopper. Thanks!

Must be due to length. I can get almost 8 Hornady critical defense 2 3/4 inch shells in mine however if I try the Winchester super x 2 3/4 inch slugs I can only fit 6 shells in because those suckers are long.

If I am not mistaken the 2 3/4 inch is the measurement of the casing after its been fired or before it has been loaded which is why we see such a difference in shell length.


ETA: the reason you did not receive the green follower is because they are out of those at the moment which is why the extension is on sale. That is what i was told in the e-mail I received when I asked about that.
 
Yep, it was the length of the Winchester slugs that I was loading at first. Switched to some shorter shells and fit 7 no problem. Now if only I wouldn't have cut the spring! Still seems to load all the shells properly, but I can hear a slight spring rattle when the mag tube is empty. That's a cheap fix though.

EBK: did you shorten your spring? And by approx how long?

Thank you both for your input!
 
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