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  #1  
Old 11-09-2009, 1:43 AM
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Default Mossberg 590A1 *Updated Pictures*

*Updated pictures with a Hogue O.M. Stock which helps out with the weight issue by bringing the shotgun closer to the body due to it being approximately 2.5" shorter than the factory stock. I also replaced the light module on the Surefire forend with the new LM1 model.

This is my parkerized Mossberg 590A1. It took a little bit of modification to get the Surefire and heat shield to fit, but well worth the time.

Specs:
Hogue O.M. Stock *new*
Surefire tactical weapon lite w/ *new* LM1 module
9 lbs unloaded...yes it's heavy
8 plus 1 rd capacity
Factory 20" heavy walled barrel
Mossberg heat shield
Burris Fastfire II red dot sight
Tac Star 6 rd side saddle


Last edited by brent_mpk; 01-09-2011 at 5:57 PM.. Reason: update pics and features
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  #2  
Old 11-09-2009, 2:08 AM
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how did you manage the surefire? is that a different bezel?
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  #3  
Old 11-09-2009, 1:59 PM
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The forend is the Surefire model# 623LFG. It came as is, and I did not have to replace any parts. As stated by Surefire, some modification is needed to make the forend fit correctly. However, I decided to modify the forend instead of their suggestion of modifying the bayonet lug. I used a dremel with a cutting wheel to grind/shave down the slide tube stop on the inside of forend. I took off a little more that a 1/4" to make the forend and the slide tube flush in the rear. This created enough of a gap between the flashlight and bayonet lug for full weapon/light function. I reversed the stock slide nut to secure the forend to the slide tube instead of trying to find a washer to fit the gap created by shaving the forend. I attached a few photos...


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  #4  
Old 11-09-2009, 6:11 PM
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nice looking shotty there mang., but that folding stock hurts like a mofo
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  #5  
Old 11-09-2009, 7:13 PM
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Sick! Hope to see you at the range one of these days
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  #6  
Old 11-09-2009, 9:50 PM
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Awesome, thanks for sharing, I am pretty sure I haven't seen anyone do that mod before, pretty straightforward and you didn't have to remove much material it looks like. Time to start saving up for the fore end.

Quote:
Originally Posted by brent_mpk View Post
The forend is the Surefire model# 623LFG. It came as is, and I did not have to replace any parts. As stated by Surefire, some modification is needed to make the forend fit correctly. However, I decided to modify the forend instead of their suggestion of modifying the bayonet lug. I used a dremel with a cutting wheel to grind/shave down the slide tube stop on the inside of forend. I took off a little more that a 1/4" to make the forend and the slide tube flush in the rear. This created enough of a gap between the flashlight and bayonet lug for full weapon/light function. I reversed the stock slide nut to secure the forend to the slide tube instead of trying to find a washer to fit the gap created by shaving the forend. I attached a few photos...


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  #7  
Old 11-10-2009, 1:01 AM
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No problem, always happy to help.
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  #8  
Old 12-18-2009, 11:26 PM
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That is one cool 590A1 there. BADASS!
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  #9  
Old 12-21-2009, 12:40 PM
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thanks
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  #10  
Old 01-11-2010, 12:45 AM
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Which heatshield did you use?
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  #11  
Old 01-13-2010, 1:32 AM
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I used the factory Mossberg heat shield off of their website. However, it's hit or miss... My friend has a 590A1 like mine(a little older), and bought the same heat shield off the Mossberg site and it did not fit.
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  #12  
Old 01-13-2010, 10:52 AM
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Quote:
Originally Posted by brent_mpk View Post
The forend is the Surefire model# 623LFG. It came as is, and I did not have to replace any parts. As stated by Surefire, some modification is needed to make the forend fit correctly. However, I decided to modify the forend instead of their suggestion of modifying the bayonet lug. I used a dremel with a cutting wheel to grind/shave down the slide tube stop on the inside of forend. I took off a little more that a 1/4" to make the forend and the slide tube flush in the rear. This created enough of a gap between the flashlight and bayonet lug for full weapon/light function. I reversed the stock slide nut to secure the forend to the slide tube instead of trying to find a washer to fit the gap created by shaving the forend. I attached a few photos...



Genius! Well done, a very nice looking 590A1.
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  #13  
Old 01-14-2010, 1:50 AM
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Thanks! The only draw back to the heat shield and surefire is that my moss weighs 10 lbs unloaded! hahahaha
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  #14  
Old 01-15-2010, 8:56 AM
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That's 10 lbs of zombie smashing goodness!
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  #15  
Old 01-15-2010, 7:22 PM
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is this the one that is sold at big 5? I was looking there today.
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  #16  
Old 01-18-2010, 8:39 PM
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love that parkerizing, really nice 590A1, I'm beginning to really like this over the 870. again, well played.
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  #17  
Old 01-20-2010, 10:38 PM
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Originally Posted by 5150bronco View Post
is this the one that is sold at big 5? I was looking there today.
Not sure if they carry this model at Big 5. I got it from thru Minute Man Firearms.
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  #18  
Old 01-21-2010, 11:46 PM
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Nice, i heard Monterey park is notorious for their good drivers?
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  #19  
Old 01-22-2010, 3:00 AM
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Nice, i heard Monterey park is notorious for their good drivers?
LOL... you heard right. Lucky I'm a good defensive driver!!!
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  #20  
Old 01-22-2010, 3:15 PM
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Originally Posted by brent_mpk View Post
I used the factory Mossberg heat shield off of their website. However, it's hit or miss... My friend has a 590A1 like mine(a little older), and bought the same heat shield off the Mossberg site and it did not fit.
Is this the heat shield you used?

Mossbert Heat Shield
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  #21  
Old 01-23-2010, 10:01 PM
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Originally Posted by NERVOUS View Post
Is this the heat shield you used?

Mossbert Heat Shield
Yes, that is the one I ordered.
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  #22  
Old 02-05-2010, 11:23 PM
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Default 590a1

so the Mossberg factory parkerized heat shield fits the heavy thick barrel of the 590A1???
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  #23  
Old 02-05-2010, 11:31 PM
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Quote:
Originally Posted by dohboy View Post
so the Mossberg factory parkerized heat shield fits the heavy thick barrel of the 590A1???
His did, but mine didn't. We ordered ours about the same time, mine a few weeks after his. His fit pretty easily, and mine there was no way it would fit.

I contacted these guys a while ago and the 20" 590a1 heatshield should be available any day now

http://www.aimprotactical.com/16873/20285.html



and yes. his shotgun is freakin HEAVY
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  #24  
Old 02-27-2010, 3:46 PM
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Just finished Brent_MPK's Surefire mod on my Mossberg. Only needed to shave/grind off slightly more than 1/4" inside the Surefire.

Mossberg 590A1 (#51663)
Surefire 623LF
Mesa Tactical stock kit (w/ Endine recoil buffer)
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  #25  
Old 02-27-2010, 4:33 PM
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huh, looks like the new LM series with one battery and shorter profile would also adress this now. That being said, i'll be keeping my eye out for a deal on any of the models because of this mod.
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  #26  
Old 02-27-2010, 5:46 PM
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yeah, i just noticed that myself on the Surefire website. i guess they were just waiting for me to buy the forend that needed modification!
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  #27  
Old 02-27-2010, 8:47 PM
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How does having that lug and potentially the bayonet effect the light? I'm going to be doing this to my 590a1, and am glad theres a way to do it without taking the lug off. Thanks for showing us how!
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  #28  
Old 02-28-2010, 6:53 AM
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Quote:
Originally Posted by Limit67 View Post
How does having that lug and potentially the bayonet effect the light? I'm going to be doing this to my 590a1, and am glad theres a way to do it without taking the lug off. Thanks for showing us how!
there is about a 1/4" overlap, where the front bezel of the flashlight hits the lug (and doesn't allow you to fully rack the weapon).
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  #29  
Old 02-28-2010, 7:07 AM
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Very nice SG guys! I'm jealous!
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  #30  
Old 02-28-2010, 8:05 AM
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Anybody want to make a tutorial on how to do this? I'm a noob and still am lost as to where to dremel and where not to...
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  #31  
Old 02-28-2010, 9:17 AM
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Quote:
Originally Posted by Limit67 View Post
Anybody want to make a tutorial on how to do this? I'm a noob and still am lost as to where to dremel and where not to...
I'd say try and dry fitting it to see where the contact is occuring. Should be able to see that 1/4 or so overlap where the foreend hits the lug. Nice shotguns in this thread. Planning on picking up the ATI folding stock for my 500a for home defense also. Now Im going to look for a good deal on that Surefire forend too.
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  #32  
Old 02-28-2010, 11:50 PM
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Quote:
Originally Posted by TommyRuss View Post


Just finished Brent_MPK's Surefire mod on my Mossberg. Only needed to shave/grind off slightly more than 1/4" inside the Surefire.

Mossberg 590A1 (#51663)
Surefire 623LF
Mesa Tactical stock kit (w/ Endine recoil buffer)
Nice Job Tommy!! Looks good!!
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  #33  
Old 02-28-2010, 11:54 PM
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Quote:
Originally Posted by rkt88edmo View Post
huh, looks like the new LM series with one battery and shorter profile would also adress this now. That being said, i'll be keeping my eye out for a deal on any of the models because of this mod.
Wow, I like the look of the new LM models. Damn, might have to waste some money on a new bezel!!!
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  #34  
Old 02-28-2010, 11:58 PM
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Quote:
Originally Posted by Limit67 View Post
Anybody want to make a tutorial on how to do this? I'm a noob and still am lost as to where to dremel and where not to...
Limit, I would just buy the new LM model as posted by rkt88edmo if you havent already bought your Surefire.
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  #35  
Old 04-01-2010, 6:08 PM
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Quote:
Originally Posted by rkt88edmo View Post
huh, looks like the new LM series with one battery and shorter profile would also adress this now. That being said, i'll be keeping my eye out for a deal on any of the models because of this mod.
Does anyone know if the 623 LM models also clear? It appears that the flashlight sticks out just as far as the older models, so it might still require modificastion?

I decided to go with the 200 lumen 623lmg instead of the 100 lumen 323lmg (lumens don't always tell actual flashlight output, but it is the same company..). I'm hoping to not need to do much modification.
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  #36  
Old 04-03-2010, 1:30 AM
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Originally Posted by Wherryj View Post
Does anyone know if the 623 LM models also clear? It appears that the flashlight sticks out just as far as the older models, so it might still require modificastion?

I decided to go with the 200 lumen 623lmg instead of the 100 lumen 323lmg (lumens don't always tell actual flashlight output, but it is the same company..). I'm hoping to not need to do much modification.
The LED module on the new LM models are shorter. It is a one battery lite which shortens the module by about an inch and half or so. I called Surefire and they stated that the LM LED module can be bought from their dealers and can be screwed straight into the older LF models. Retail for just the LM LED module is $165. Really want the new module, but not sure if I want to spend that much for it.

Last edited by brent_mpk; 04-03-2010 at 3:49 AM..
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  #37  
Old 04-08-2010, 8:52 AM
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Well, I suspect that the 6 series LM that I ordered may be too long. I think that it is the 2 cell vs. 1 cell that makes the difference. I guess that I'll be finding out when the unit arrives.

I still think that the 2 cell is a better idea even if I need to modify (thanks to the OP for this mod-it looks like just the trick). 100 lumens vs. 200 lumens just seems like a no brainer.

That being said, the bezel design looks to be a bit differnt on the LMs...Perhaps it will clear after all? It would be interesting to hear from someone who has mounted the new 6 series LM to see if it clears. I have a message into Surefire as well, but who knows how long it might take to figure this one out.

Last edited by Wherryj; 04-08-2010 at 8:57 AM..
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  #38  
Old 04-12-2010, 5:17 PM
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I suspect that this is related to the fact that you needed to grind 1/4inch off the forend, but I installed the 623LMG and it seems to be sitting about 1/4inch forward on the slide tube.

The LMG series bezel is a bit more sleek, and it clears the bayonet lug however it does so just barely. I was wondering if there was something hanging up the forend (ie. if it somehow slid forward after I attached it, but before I could get the forend nut back on)?

I didn't have a forend wrench and don't really want to risk the screwdriver again. I somehow managed to not ding up the nut or the barrel, but I'm not counting on continued good fortune. Unfortunately no local shops carry the wrenches...

Sorry for the low quality Blackberry photos. My son ran off with my camera.
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  #39  
Old 04-13-2010, 1:05 AM
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Quote:
Originally Posted by Wherryj View Post

I suspect that this is related to the fact that you needed to grind 1/4inch off the forend, but I installed the 623LMG and it seems to be sitting about 1/4inch forward on the slide tube.

The LMG series bezel is a bit more sleek, and it clears the bayonet lug however it does so just barely. I was wondering if there was something hanging up the forend (ie. if it somehow slid forward after I attached it, but before I could get the forend nut back on)?

I didn't have a forend wrench and don't really want to risk the screwdriver again. I somehow managed to not ding up the nut or the barrel, but I'm not counting on continued good fortune. Unfortunately no local shops carry the wrenches...

Sorry for the low quality Blackberry photos. My son ran off with my camera.

No, that is sitting correctly. The rear of my Surefire looked exactly like that before I did the mod. I do not have the tool for the lug nut either, and instead used a strap wrench to tighten/loosen the nut. The grinding/cutting is not to difficult with the dremel if you want more clearance.
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Old 04-13-2010, 7:50 AM
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Quote:
Originally Posted by brent_mpk View Post
No, that is sitting correctly. The rear of my Surefire looked exactly like that before I did the mod. I do not have the tool for the lug nut either, and instead used a strap wrench to tighten/loosen the nut. The grinding/cutting is not to difficult with the dremel if you want more clearance.
Thanks, that is what I thought. From the modification you made it sounded like the forend never really fits fully back on the slide. I didn't look that closely at the original Mossberg stock, but I didn't remember it fitting that way.

You saved me from removing everything again just to make sure. Thanks!
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