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Need a Mossberg expert

Discussion in 'Mossberg 500 Pump Action' started by 1winnen, Aug 9, 2018.

  1. 1winnen

    1winnen .410

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    I got a 500 several months ago and was going to convert it to a bullpup but it won't fit into the lower section of the kit. I have just found out that it's actually a 500A. Here's where I need an expert. Is there ANY difference between to 500 and 500A. I'm thinking maybe there's some difference in the receivers. Another question. Are the barrels interchangeable between the 500 and 500A?
  2. nitesite

    nitesite Sheepdog Forum Moderator "Philanthropist"

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    5,174
    500A is the 12-ga version.
    John A. likes this.
  3. 1winnen

    1winnen .410

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    That I know. I'm needing to know if there's any difference between the two. Like maybe the receiver being wider, longer etc.
  4. John A.

    John A. I'm "THAT" guy Staff Member Global Moderator Forum Moderator

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    12,984
    To my knowledge, the 12 gauge Mossberg 500 and the 500A is the same gun.

    500B=16 gauge.
    500C=20 gauge
    500E=410

    There was a time way back when the 500A only had one action arm. But I don't think that would be enough to interfere with anything if you did by chance happen to have one of the older ones. There would just be a void inside where the action arm isn't.

    500 and 500 A barrels are the same. Though some have a vent rib, others don't. Some have rifle sights, some don't.

    500 and 590 barrels are not the same either.

    I'm far from a Mossberg expert.
    Last edited: Aug 10, 2018 at 9:03 AM
    old mossy likes this.
  5. 1winnen

    1winnen .410

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    68
    Well there's something that's different between the 500 and 500A. As I said I was going to convert it using the Bullpup conversion kit BUT it won't seat all the way into the lower portion of the kit. It rocks up and down like it's riding on something. Thought it might have been the trigger guard so I removed it but the issue is still there. Plus when I did try to put the upper portion of the kit on there's about a 1/8-1/4" gap at the rear again not allowing it to fit properly.
  6. old mossy

    old mossy Global Moderator Staff Member Global Moderator Forum Moderator

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    12,484
    Do you know the year of the 500? Like John said it might be pre 1969 one arm model.
  7. Scoop

    Scoop .30-06

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    I searched for "mossberg 500 vs 500a difference" and learned that even the "experts" online don't know the answer.

    Here is what I would suggest you do in your situation. Go to a friend who has a 500 and see how the BP conversion fits it differently. Then you will be the expert!

    I have a 500. If you are near E TN I'd be happy to lend you mine for that test.
  8. 1winnen

    1winnen .410

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    Thanks for the offer Scoop but I was able to figure out the problem. I had changed out the original safety switch and it sat too high so it was hitting inside the upper portion of the kit. I turned it around and everything went together.
    Scoop likes this.
  9. Scoop

    Scoop .30-06

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    1,432
    OK, Buddy. Congrats. You owe some pix of this soon. I'd love to see 'em.
  10. 1winnen

    1winnen .410

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    Will do. Plus need to camouflage it first. Here's 3 camo designs I'm looking at. I actually like the first 2 better. They look cleaner plus really only need 1 color, flat sand and a clear coat. Going to use Krylon Fusion spray paint.

    Attached Files:

    meanstreak and Scoop like this.
  11. John A.

    John A. I'm "THAT" guy Staff Member Global Moderator Forum Moderator

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    12,984
    If you use a clearcoat spray, make sure whatever base color brand you use, use the same brand clearcoat.

    Mixing rustoleum basecoat and krylon matte clear for example, will react differently to each other and stay tacky.
  12. 1winnen

    1winnen .410

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    Both spray paints, sand and clear, are by Krylon.
  13. Scoop

    Scoop .30-06

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    1,432
    [​IMG]
    Pic of 1winnen's Bullpup

    That is a beaut! Give us a description of the mod.
  14. 1winnen

    1winnen .410

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    Well first of all that pix was someone else. I was just looking at others to get an idea of how I wanted to camo mine. If you were asking about mods to my bullpup I haven't even put it together yet. First need to cut some off of the slide tube that they provide for the forearm so that the action I have will work. Other then the camo job I'm going to add a holographic sight, angled forearm grip and a 4-6 side saddle carrier.
  15. 1winnen

    1winnen .410

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    68
    Oh do you happen to know anyone with a stock Mossberg 500 or Maverick 88 who would like to make it more tactical. I have several items that I took off my 500 and I'd like to sell them. Need some money to help cover what I paid for the bullpup kit.
  16. old mossy

    old mossy Global Moderator Staff Member Global Moderator Forum Moderator

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    12,484
  17. Scoop

    Scoop .30-06

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    1,432
    OK. Gotchya. I'll be looking forward to progress reports.
  18. 1winnen

    1winnen .410

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    68
    Good idea thanks. Just posted one.

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