MOSSBERG 590A1

[abusalim81]

I've bought an after market magazine tube spring and I'm not sure ho to take out the old one... Does any body have any experience replacing the tube spring?

[flying2275]

I dont know for sure about the 590a1 but on my 590 there is a threaded cap on the end of the tube. Just unscrew it and pull the spring out.

[jedinerd]

Just unscrew the cap on the end of the magazine tube. Be careful though, it can shoot off at you with some force fairly unexpectedly. I would wear safety glasses.

[Fuzzy5]

If you have the 18.5" 590A1, you'll have to unscrews the cap and then carefully pry out the mag spring retainer with a flat screwdriver or something similar. Sometimes it's a bit stubborn, but just work one side of the retainer, then the other, until it's almost out. Put your hand over the end of the tube to catch the spring when the retainer is freed. If Mossberg is still using the same cheesy spring, there actually won't be much force on it, assuming you remembered to empty the mag tube.

If you do have the crappy spring (you can tell because it will look like it was made for a 20-gauge tube and its uncompressed length will be only 5 or less inches longer than the tube), do yourself a favor and get yourself a 3-pack of Wolff springs.

[abusalim81]

Yup wolff spring is what I've purchased... Thanks guys!
I'll let you know how it goes and hopefully I'll get to keep both of my eyes after this operation "Wolff spring" is over.

[G60]

My 20" 590A1 also has the spring retainer under the mag cap.

[M1A Rifleman]

Remove the end cap, carefully pop out the sheet metal plug, and it springs out. Even I can do this without screwing up stuff.

[Hayashi Killian]

who doesn't love juggling the cartridge stop and the cartridge interupter?!

NOT ME!

Yeah, that's the funnest part or re-assembly after field stripping...not sure if it's the getting the bolt follower to properly align up or making sure the cartridge stop and interrupter don't fall out while you get the bolt in.

[abusalim81]

Ok so I removed the end cap and tried to remove the plug but it seems to be so thin and bends very easily... So before I continue, someone please tell me which is the best way to do this without bending the plug?

[M1A Rifleman]

Ok so I removed the end cap and tried to remove the plug but it seems to be so thin and bends very easily... So before I continue, someone please tell me which is the best way to do this without bending the plug?

Carefully is all I can say. I was able to get mine out without too much force.

[L-2]

The retaining-plug/retainer may get slightly bent when removing. Be careful not to bend the edges of the mag tube when prying out the retainer.

Some may disagree, but upon reassembly, you can omit reinstalling the retainer (especially if it gets too bent up) and just screw the mag tube cap over the spring.

[EBR Works]

You could just unscrew the entire mag tube from the receiver, replace the spring and follower and screw it back on. Just be careful not to deform the soft aluminum of the tube by using the wrong tool. Ask me how I know....

When I had to then replace the mag tube, it was easy to use a large flat blade screwdriver to pry out the end cap. Just go slow and pry it out evenly.

[savasyn]

I agree with L-2, remove the retainer clip and throw it away. I have three Mossbergs(500, 590 and 590A1) and only the newest one(590) had the clip, but no more. I understand why it's there, but it's not needed.

[abusalim81]

Finally, after 4 months I've installed the Wolff spring in my Mossberg 590A1!

Thanks for all the advice.

[Al LaVodka]

Finally, after 4 months I've installed the Wolff spring in my Mossberg 590A1!

Thanks for all the advice.

Oh boy.

By the way, when I know there is a funky spring and or spring-loaded plunger or something, I wear safety glasses and put the arm in a dry-cleaning bag as I'm handling it carefully -- it adds a clear layer of minimal protection and also helps to contain parts that could easily get lost if, when, you lose control...

Al