This is how I converted a Marlin pump 22, to new type mag tube.
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Thread: This is how I converted a Marlin pump 22, to new type mag tube.



  1. #1
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    This is how I converted a Marlin pump 22, to new type mag tube.

    How to convert a Marlin pump Model 18,20,25,29,37,47 to a new type magazine tube.

    I was asked if there was a replacement mag tube for a Model 20 out there, by K Close. I told him you can try to find an original, but the odds are not that good, these days. And if you do
    it might cost more than you want to spend, just to get a gun shooting again.

    I mentioned to him the Wiesner kit, but that is not a drop in kit, even for the Lever guns that it says it will replace.
    So I decided to see if it could be done.
    And yes it can be done. Two ways for that mater.

    The 1st, a gunsmith would in most cases, have to do. Buy removing the barrel, and enlarging the mag hole, so the outer tube will fit.
    But this way is not reversible. And if you found an original after words, you would be out of luck. Not a problem if you have just a shooter.

    But if you have a collectible gun, that you would like to shoot. While waiting for a good original.
    That is where the 2nd way comes in. This PDF will show how I did it. It also shows what a 1st type fix should look like. And how a original should work.
    If you print this out, make sure you put down, "Fit to page" on your printing options. Otherwise it might not print out right.

    Hope this will help.

    P.S. I also have an idea for putting a new style magazine tube on a Marlin pump 32, and 38. Just needs a little work.
    Last edited by Schtoolee; 04-23-2013 at 11:26 PM.
    La'i-be'eeldoh=(many guns)-NRA Life - Marlin league #16, Minnesota MarlinOwners--Team's= Marlin Express, Levermatic, 35 Rem #68, 32 Special #4, 45-70 #28, 1894 #94,30-30 #131, 39 #39, 38-55 #39, X7 #47, 60 #120, Shotgun #3, 366-44 #2, 44-40 #37, 22 Mag #006, 356 #?, MR7 #3 pending-Finally an Updated Marlin Dates and Production sheets.-Marlin Model 32-38 Pump Project-LEVERMATIC Catalog pages 1955-69 -This is how I converted a Marlin pump 22, to new type mag tube.

  2. #2
    Marlinstigator Marlin Fanatic
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    I will add regular jpgs for those that can't load my Pdf file above.
    1 How to convert a Marlin pump Model 18,20,25,29,37,47.jpgtools.jpg3.jpg4.jpg5.jpg
    RB Rider and marlinman93 like this.
    La'i-be'eeldoh=(many guns)-NRA Life - Marlin league #16, Minnesota MarlinOwners--Team's= Marlin Express, Levermatic, 35 Rem #68, 32 Special #4, 45-70 #28, 1894 #94,30-30 #131, 39 #39, 38-55 #39, X7 #47, 60 #120, Shotgun #3, 366-44 #2, 44-40 #37, 22 Mag #006, 356 #?, MR7 #3 pending-Finally an Updated Marlin Dates and Production sheets.-Marlin Model 32-38 Pump Project-LEVERMATIC Catalog pages 1955-69 -This is how I converted a Marlin pump 22, to new type mag tube.

  3. #3
    Marlinstigator Marlin Fanatic
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    marlinman93 and RB Rider like this.
    La'i-be'eeldoh=(many guns)-NRA Life - Marlin league #16, Minnesota MarlinOwners--Team's= Marlin Express, Levermatic, 35 Rem #68, 32 Special #4, 45-70 #28, 1894 #94,30-30 #131, 39 #39, 38-55 #39, X7 #47, 60 #120, Shotgun #3, 366-44 #2, 44-40 #37, 22 Mag #006, 356 #?, MR7 #3 pending-Finally an Updated Marlin Dates and Production sheets.-Marlin Model 32-38 Pump Project-LEVERMATIC Catalog pages 1955-69 -This is how I converted a Marlin pump 22, to new type mag tube.

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  5. #4
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    And the last 4.
    12.jpg11.jpg13.jpg14.jpg
    marlinman93 and RB Rider like this.
    La'i-be'eeldoh=(many guns)-NRA Life - Marlin league #16, Minnesota MarlinOwners--Team's= Marlin Express, Levermatic, 35 Rem #68, 32 Special #4, 45-70 #28, 1894 #94,30-30 #131, 39 #39, 38-55 #39, X7 #47, 60 #120, Shotgun #3, 366-44 #2, 44-40 #37, 22 Mag #006, 356 #?, MR7 #3 pending-Finally an Updated Marlin Dates and Production sheets.-Marlin Model 32-38 Pump Project-LEVERMATIC Catalog pages 1955-69 -This is how I converted a Marlin pump 22, to new type mag tube.

  6. #5
    Tenderfoot
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    Have you successfully done this on a Marlin 38? If so, what do I need to know on the 'how-to-do-it'? Please give me some details as we really would like to be able to shoot this 38.

    Thank you VERY VERY MUCH. sksranch@vistabeam.com
    Schtoolee likes this.

  7. #6
    Wrangler
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    Very nice step by step instructions and great pictures Schtoolee. Thanks.
    Schtoolee and RB Rider like this.

  8. #7
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    Quote Originally Posted by sksranch View Post
    Have you successfully done this on a Marlin 38? If so, what do I need to know on the 'how-to-do-it'? Please give me some details as we really would like to be able to shoot this 38.

    Thank you VERY VERY MUCH. sksranch@vistabeam.com
    I have seen a few that were done that way. And I have one that I plan on putting the new type mag on. But haven't done it yet.
    The problem is that it is real tight between the barrel and mag. So the ones that I have seen done, have the top part of the outer tube, removed. So that the inner tube is only supported by 3/4th of the outer tube, on the last 1/2 inch or so. The inner tube then has enough room to go into the reciever. You might also have to round off the edges of the reciever on the top of the hole. So that the inner tube doesn't hang up.
    If I get a chance, I will try doing this soon on my project 38, and update this post, with new pictures.
    La'i-be'eeldoh=(many guns)-NRA Life - Marlin league #16, Minnesota MarlinOwners--Team's= Marlin Express, Levermatic, 35 Rem #68, 32 Special #4, 45-70 #28, 1894 #94,30-30 #131, 39 #39, 38-55 #39, X7 #47, 60 #120, Shotgun #3, 366-44 #2, 44-40 #37, 22 Mag #006, 356 #?, MR7 #3 pending-Finally an Updated Marlin Dates and Production sheets.-Marlin Model 32-38 Pump Project-LEVERMATIC Catalog pages 1955-69 -This is how I converted a Marlin pump 22, to new type mag tube.

  9. #8
    Marlinstigator Marlin Fanatic
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    Well took a closer look, and there is enough room, between the barrel and the mag tub, so taking the top of the mag tube, is not needed.

    But there is 3 ways to install the new mag tube.
    1- File or sand down the outer tube so it will fit the hole. This will leave a very thin tube on the end.
    So probably not the best.

    2- Remove the barrel, and drill out the first 1/8 of the hole, so that the out mag will fit.
    This is probably the best way, but if you find a original, it won't work.

    3- Make a adapter, that you can then epoxy, to the receiver. I made this out of a bit shy of a 1/8 of some plastic, that I had, sitting around. Because it was easier to work with, then metal, and it still should work.
    This way if you find an original, it can be removed.


    uploadfromtaptalk1453499525280.jpguploadfromtaptalk1453499534156.jpguploadfromtaptalk1453499539320.jpguploadfromtaptalk1453499551787.jpguploadfromtaptalk1453499568330.jpg
    Last edited by Schtoolee; 01-23-2016 at 01:15 PM.
    La'i-be'eeldoh=(many guns)-NRA Life - Marlin league #16, Minnesota MarlinOwners--Team's= Marlin Express, Levermatic, 35 Rem #68, 32 Special #4, 45-70 #28, 1894 #94,30-30 #131, 39 #39, 38-55 #39, X7 #47, 60 #120, Shotgun #3, 366-44 #2, 44-40 #37, 22 Mag #006, 356 #?, MR7 #3 pending-Finally an Updated Marlin Dates and Production sheets.-Marlin Model 32-38 Pump Project-LEVERMATIC Catalog pages 1955-69 -This is how I converted a Marlin pump 22, to new type mag tube.

  10. #9
    Marlinstigator Marlin Fanatic
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    After you make the adapter, the bolt will be a bit harder to remove from the reciever, but it will work.

    Also, then refer to first part of post, for cutting down the tubes.
    La'i-be'eeldoh=(many guns)-NRA Life - Marlin league #16, Minnesota MarlinOwners--Team's= Marlin Express, Levermatic, 35 Rem #68, 32 Special #4, 45-70 #28, 1894 #94,30-30 #131, 39 #39, 38-55 #39, X7 #47, 60 #120, Shotgun #3, 366-44 #2, 44-40 #37, 22 Mag #006, 356 #?, MR7 #3 pending-Finally an Updated Marlin Dates and Production sheets.-Marlin Model 32-38 Pump Project-LEVERMATIC Catalog pages 1955-69 -This is how I converted a Marlin pump 22, to new type mag tube.

  11. #10
    Tenderfoot
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    Marlin 25

    Good day sir.
    i have just acquired a 25 slide action in good shape.
    the cartridge guide spring and screw are missing
    I wonder if you have a photo of this spring and screw?
    i doubt I could find one but I might be able to make one

    regards

    brian
    brianmp@rogers.com


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