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Thread: Opportunity for some of you 3D printer peoples

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    Registered User Garrett's Avatar
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    Opportunity for some of you 3D printer peoples

    So I was just looking over Gunbroker at asking and completed prices for Reising mags. They have always been kind of spendy, just due to the relatively low numbers out there. Now they are going for anywhere from $100-$300 when people can find them.

    So I pulled out an Uzi .45 magazine, just to see. The Uzi mag is noticeably thinner than the Reising mag, as well as being more narrow front-to-back. It looks like there may be enough room to fit a magwell adapter in there. It could latch in place using the standard Reising mag catch, and then have another catch in the standard Uzi location.

    While Uzi .45 mags are also not inexpensive, I have found the Promag 22-round mags seem to work fairly well. Just holding it and cycling the bolt by hand it looks like it could work.

    I'm not sure if an in-place adapter would be thick enough to withstand inserting/removing the Uzi mags into a long adapter. But what about making an adapter that stays attached to the mag? The Uzi mag would provide structural stability to the adapter at that point. I wonder if the plastic would hold up at the mag catch. Maybe a piece of sheet metal with a hole could be incorporated / molded into the plastic 3D print.

    Promags can be had for around $30. Add maybe $20-25 for the mag adapter sleeve, and it could be something. If someone wants to run with it and see if they can get it to work.





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    Registered User Uncle Billy's Avatar
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    that looks like something you can do yourself, not by making a adapter to fit in the mag well but by modifying a UZI mag(PROMAG) to fit in the REISING mag well. by using plastic spacers and epoxying it around the the mag, so that it will fit in the mag well then notch it for the mag catch. you got a couple things going for you

    1) the mag is the same caliber as the gun

    2) you don't have to modify the mag from a double stack to a single stack mag

    I have done that on a couple of different mags by making a drum feed tower for rifles that no drum even existed for them.

    one was for a SAR 3 and SLR-106UR (5.56 AKs) to go onto 100 round BETA drum. I just cut the top portion off a plastic TAPCO GAILIL/GOLINI mag then mated it to the bottom half of a BETA 5.56 AR feed tower then reinforced it with alumium flat stock, by epoxying (J-B WELD) on the sides. I did that more then 5 years ago and it has held up through hundreds of firing.






    I also made a drum for my PPS 43, by using a PPS 43 mag and welding it onto a PPsH 41 drum. that one was a tiny bit challenging, as I had to use spacers in the mag to make it single stack feed






    right now I made a 70 round drum for my MP5-K PDW using a SUOMI 9mm drum, it feeds great by hand cycling the rounds, just have to take it to the range tomorrow and shoot it. I'm 99 percent confident that it will function perfectly. I'll make a thread about what the result was in the HK TALK forum




    I learned a long, long time ago that if you wait for someone else to make it for you, "you can crap in one hand and wish in the other and see which one fills up first".

    that looks like something simple and very doable(modifying the mag) you can do. as the saying goes, "nothing ventured nothing gained", beats paying a few hundred dollars for a REISING mag
    Last edited by Uncle Billy; 08-16-2020 at 08:37 PM.

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    ... also, Reising Mag wells are removable. It might be easier to modify one magwell to fit the UZI magazines.

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    Garrett,
    It sounds like a good idea. I am not familiar with the Uzi 45 mags but my Reising mags have a very narrow "nose" and long taper to clear the action bar. When you checked the fit, ("Just holding it and cycling the bolt by hand it looks like it could work.") could you see that the Uzi mag presented the round as high in the action as the Reising mags? Does the Uzi mag rub on the action bar when it is pushed high enough to present the cartridge at the same level as the Reising mag?

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    Registered User Garrett's Avatar
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    Quote Originally Posted by Shooter View Post
    Garrett,
    It sounds like a good idea. I am not familiar with the Uzi 45 mags but my Reising mags have a very narrow "nose" and long taper to clear the action bar.
    The Uzi mag is around .150 narrower than the Reising mag. It does not appear to drag on (or even touch) the action bar when inserted.

    I cobbled something together, just as a proof of concept, using a wood spacer in the rear and some cardboard spacers on the sides for width. Cycling by hand, it appears it should work just fine.

    Ill try to get out to the range and put some rounds through it.



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    Registered User Garrett's Avatar
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    Quote Originally Posted by Starvingboy View Post
    ... also, Reising Mag wells are removable. It might be easier to modify one magwell to fit the UZI magazines.
    I thought of that too. The issue there is you are stuck using mags for whichever magwell you have installed. Ideally, if I could attach an inexpensive adapter to the mag one could switch between Reising and Uzi mags and back as easily as swapping mags.

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    Registered User Garrett's Avatar
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    Looking promising...


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    Registered User Uncle Billy's Avatar
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    Quote Originally Posted by Garrett View Post
    Looking promising...

    now that is what I'm talking about

    and with the cheap PROMAGs you can modify a whole bunch of those

    I just finished up my MP5 drum, using a SUOMI drum, and tested it this afternoon.......I don't have a full auto, but I'm about 97 percent sure it would work flawlessly. I wound the spring to where could keep up with rapid firing

    https://www.youtube.com/watch?v=IqoaYqNaeJM
    Last edited by Uncle Billy; 08-22-2020 at 11:48 PM.

  9. #9
    Registered User Garrett's Avatar
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    So I had also posted this over on the Machinegunboards.com Reising forum. One of the members there picked up the idea and started running with it.

    Looking pretty promising so far...

    http://youtu.be/TUHSAPprCv0

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    This is awesome, Id love a drum for the M50.
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    Registered User Uncle Billy's Avatar
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    Quote Originally Posted by rybread View Post
    This is awesome, I’d love a drum for the M50.
    that wouldn't be so insurmountable to do........... THOMPSON drum, put a spacer in the stick mag to make it single stack feed, then weld the mag (feed tower) to the drum.

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    Registered User Garrett's Avatar
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    Mag sleeves are in production. Being made by DougStump, over at Machinegunboards.com Reising forum. Hes essentially selling them for the cost of materials. Way cool.

    Of course, now nobody seems to have the Promag Uzi mags in stock. Go figure.

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    Quote Originally Posted by Garrett View Post
    Mag sleeves are in production. Being made by DougStump, over at Machinegunboards.com Reising forum. He’s essentially selling them for the cost of materials. Way cool.

    Of course, now nobody seems to have the Promag Uzi mags in stock. Go figure.
    Hey Garret, hope you have been well- are Glock .45 drum towers small enough to use? I got a fever and the doctor says only a drum mag can treat it.
    Live BRAVE, Live FREE!

  15. #15
    Registered User Garrett's Avatar
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    Quote Originally Posted by rybread View Post
    Hey Garret, hope you have been well- are Glock .45 drum towers small enough to use?
    Keep in mind the Reising was designed with a mag that aligns at 90 to the barrel. A Glock mag is angled since the magwell is located in the grip.

    While a Glock mag should physically fit in the magwell, the angle is such that it will likely not be possible to align the mag correctly without doing some surgery to the magwell.

    Best bet might be to modify an existing drum and replace the feed tower with something more like a Reising mag.

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    If I recall, you'll need to modify the receiver to make a glock mag fit. Tried it a while ago, no dice.

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