New Mag extension for Mossberg 590A1 18.5"
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Old 03-13-2011, 03:30 PM   #1
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Default New Mag extension for Mossberg 590A1 18.5"

I received my new Mag extension for my Mossberg 590A1 18.5"

This is a new offering from CHOATE Machine and Tool. It is NOT (as of this posting) yet listed on their website. Choate calls it a "+1 mag extension"
It comes with extension tube, new longer spring, new Choate follower, and a barrel/mag clamp on sling mount. If you use the Choate supplied follower, it is indeed a "+1", But if you use the Mossberg factory follower - It is a "+2" tight.

I did, however, buy a Brownells Aluminum Follower(anodized orange), and a Wolff tubular magazine spring (40" long) and cut it to length -29" and bent in both ends.

It still is a plus +2 but with a bit more room, beacause Wolff spring dia. is smaller than the Choate supplied spring

So my Mossberg 590A1 18.5" now has a capacity of 7+1 :P

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Old 03-13-2011, 04:36 PM   #2
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Very nice!
I have been thinking about one for my 18.5" barrel.
I see you opted for the wood, heat shield as well as different sights.
Looking good
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Old 03-13-2011, 04:56 PM   #3
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Very nice!
I have been thinking about one for my 18.5" barrel.
I see you opted for the wood, heat shield as well as different sights.
Looking good
Thanks,

The wood stock, was the stock that came with the 590A1, it was painted black from the factory. I stripped it, and stained it. Also the fore end that came with the shotgun was the synthetic type. I orderd a new unfinished wood fore end and stained it the same as the stock. Heatshield is a mossberg that I modified to fit.

Lastly, the sights are the factory ghost ring sights that came with it
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Old 03-13-2011, 05:09 PM   #4
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Looks good sb. How about an overall picture of that thing?
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Old 03-13-2011, 05:48 PM   #5
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Looks good sb. How about an overall picture of that thing?
Thanks

Some more pics.



Last edited by sbninja; 03-13-2011 at 05:51 PM.
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Old 03-13-2011, 06:08 PM   #6
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Awesome! The wood finish kind of makes it look like a WWII trench gun. Very cool.
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Old 03-13-2011, 07:02 PM   #7
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I guess I never paid much attention to the front sihgt of the ghost ring, I have a 3 dot on mine.
I like the look of the wood, I hope to get a heat shield soon.
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Old 03-13-2011, 07:27 PM   #8
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I guess I never paid much attention to the front sihgt of the ghost ring, I have a 3 dot on mine.
I like the look of the wood, I hope to get a heat shield soon.
If you have a 590A1 18.5" , then get the heatshield from AimproTactical! They make one that fits this model without modification. I found out a couple days too late.

Last edited by sbninja; 03-13-2011 at 10:21 PM.
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Old 03-13-2011, 08:00 PM   #9
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If you have a 590A1 18.5" , then get the heatshield from AimproTactical! They make one that fits this model without modification. I found out a coupld days too late.
Yes, That is who I was suggested to buy it from.
Thanks
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Old 08-13-2011, 01:09 PM   #10
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SBNINJA or others. Love your 590A1.

I just picked up this model not too long ago:
http://www.mossberg.com/images/Mossberg_Guns/930/NEW/53690.jpg


I am trying to figure out how to install the Aimpro tactical heatshield which I just received however it doesn't appear that it will work with the 3 dot sight that comes standard on this model. Was that the case for you or am I missing something? Do I basically need to remove the front sight and rear sight to install the heat shield then i have to get all new sights installed?

Last edited by sethhobrin; 08-13-2011 at 06:03 PM.
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