Umarex Notos Magazine problem

So this gun has been out for about a year if memory serves me right, and I know most of you are familiar with the problem. Idk how many of you know the reason for the issue so I did some digging through youtube for my own knowledge and to possible spread awareness to those who need it as well. It seems to be both a magazine and probe issue although not all magazines are faulty. Hope the video in link helps out!

 
Great video and thanks for posting it! Also excellent failure analysis figuring out the issue with the probe.

I was able to get all my factory Notos magazines to work perfectly with any pellets I tried over a year ago by adding a small cover extension as shown in the photo below.

Copy and paste of from about a year ago of my method to fix the dragging back issue. I got this idea from AGN member Rawroots. One was a temp fix using thick clear packing tape and that temp fix has lasted over a year. It is hard to see in the photo. Look for the reflection over the right half of the opening. The other is made from some 0.006" stainless steel scope base shim stock which has also lasted over 1 year.
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Thanks Rawroots. Very ingenious fix and thanks for sharing it!

I tried making the grooves like you did and it looks like that is the easiest method to prevent pulling the next round back out of the magazine from probe drag. However, if the pellets are not seated deep in the magazine, or if they work their way out so they are touching the clear cover, then the grooves do not work.

I had some micro gouges that were used in wood carving and block printing that made some clean grooves pretty quickly and was able to make one mag "groovy" in just a few minutes. Is there a need to put the grooves farther down than the shortest pellet one plans on using? I did just one groove about 1/16" in from the top, fairly deep and it seems to work 100%,, as long as the pellets are seated deep in the mag, even with using the ball end of an allen key to test, that grips even more than the probe would. Not one single pull back no matter how fast or slow I punch it in and out. But if the pellets are touching the clear cover, then it jams every time.


Just to see if a single hole cover would do the job, I put one layer of fairly thick, clear packing tap on the inside of the clear cover to block the top half of the loading / feeding port on four magazines and I tried to get them to jam with 21 rounds each. Not one single "pull back" caused jam! I don't know now long that tape will stay there but time will tell. If I get ambitious I will probably end up making a shallow recess on the inside surface of the clear cover and epoxy a small piece of clear clamshell merchandise display packaging over the top half of the opening. If you put too much tape on there, then the mags won't fit in the gun.

Now that I know about the set screw below the cover retaining screw, opening these up and doing modifications goes very quickly. I am anxious to try some set screws underneath the small spring loaded ball tipped cover indexing screws as well.

By the way, the small recoil stop set screws that come in the UTG dovetail to picatinny adapters are the same size as those used in the Notos mags. I only have two springers so I have a fairly large collection of those setscrews. More than enough to add to my Notos mag detent screws, eliminating the need for thread locker and making tuning the tension a breeze!


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Clear Packing Tape Temp Fix


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Permanent fix using some 0.006" stainless steel scope base shim stock from Brownells, glued onto the clear cover with CA glue. The black marks are from a Sharpie used to help cut the shape out. I used regular kitchen scissors. Not a single pull back even when trying to force it with a ball end allen key.

It is fun for me to try to fix stuff that is poorly engineered / built and very satisfying when it works. With my normal hourly rate, those mags will be "worth" about $200 each for my time when I am done!
 
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Great video and thanks for posting it! Also excellent failure analysis figuring out the issue with the probe.

I was able to get all my factory Notos magazines to work perfectly with any pellets I tried over a year ago by adding a small cover extension as shown in the photo below.

My post from last year on how I did it. One was a temp fix using thick clear packing tape and that temp fix has lasted over a year. It is hard to see in the photo. Look for the reflection over the right half of the opening. The other is made from some 0.006" stainless steel scope base shim stock which has also lasted over 1 year.


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I'm glad your fixes have worked well! Although seeing your fix makes me wonder why they chose such a large opening on the clear plate.
 
I'm glad your fixes have worked well! Although seeing your fix makes me wonder why they chose such a large opening on the clear plate.

Yup, it is too big and causes the different jamming problem that I had with all of my factory Notos mags. Had I known they would do this I would have not purchased a dozen of them. But, once I owned them I wanted to make them work! At my hourly rate then ended up being $75 magazines. It is like many of the makers never even look at the airgun forums to see the "free" R&D and troubleshooting information here. The Notos probe design and the too large of an opening on the magazine covers should have been fixed by Umarex by now one would think, with all the information out there for the taking.

The problem with my 3 Notos rifles was not that they would jam when feeding a pellet, but that the probe would pull the next pellet backwards out of the magazine, leaving it partway in and partway out of the magazine, jamming the gun and making mag removal very difficult. It has been over a year since I dealt with it, but I think I had to push the pellet farther back out of the mag with a rod to get it out.

I ended up getting some right side loading Carm mags so I could use a large focus wheel. They upped the round count and solved the jamming problems completely, both seating and dragging pellets out of the mag.

FYI, copied the text from and fixed the link in my previous post in this thread. Here is the link as well. My fix from about a year ago for the dragging back issue.
 
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Yup, it is too big and causes the different jamming problem that I had with all of my factory Notos mags. Had I known they would do this I would have not purchased a dozen of them. But, once I owned them I wanted to make them work! At my hourly rate then ended up being $75 magazines. It is like many of the makers never even look at the airgun forums to see the "free" R&D and troubleshooting information here. The Notos probe design and the too large of an opening on the magazine covers should have been fixed by Umarex by now one would think, with all the information out there for the taking.

The problem with my 3 Notos rifles was not that they would jam when feeding a pellet, but that the probe would pull the next pellet backwards out of the magazine, leaving it partway in and partway out of the magazine, jamming the gun and making mag removal very difficult. It has been over a year since I dealt with it, but I think I had to push the pellet farther back out of the mag with a rod to get it out.

I ended up getting some right side loading Carm mags so I could use a large focus wheel. They upped the round count and solved the jamming problems completely, both seating and dragging pellets out of the mag.

FYI, copied the text from and fixed the link in my previous post in this thread. Here is the link as well. My fix from about a year ago for the dragging back issue.
See the problem is that umarex doesn't really fix guns from what I have heard. And also this notice is pretty much a pp700 pistol, so shouldn't those mags work just fine? I ended up buying some mags from @Firewalker But I will see if I can make these work for me with what you did. I think the only reason why the mags worked one time was because I'm shooting 18.80gr Wadcutters. The polymags fit in the first hole but they're too long for the rest 😒. Single shot It is for me.
 
See the problem is that umarex doesn't really fix guns from what I have heard. And also this notice is pretty much a pp700 pistol, so shouldn't those mags work just fine? I ended up buying some mags from @Firewalker But I will see if I can make these work for me with what you did. I think the only reason why the mags worked one time was because I'm shooting 18.80gr Wadcutters. The polymags fit in the first hole but they're too long for the rest 😒. Single shot It is for me.

Maybe I should watch your video again. What I got the first time was that the round going in was jamming which is different from my problem with it pulling the 2nd pellet partially back out of the magazine when caulking it to load the next one.

Do the Firewalker mags work with the polymags? I don't have any of those on hand to try in my Carm mags but the outer walls of the Carm mags are thicker than the cover plate and walls of the factory mags, so I am guessing they would be too long in the Carm which has 10mm of depth for the pellet.
 
Maybe I should watch your video again. What I got the first time was that the round going in was jamming which is different from my problem with it pulling the 2nd pellet partially back out of the magazine when caulking it to load the next one.

Do the Firewalker mags work with the polymags? I don't have any of those on hand to try in my Carm mags but the outer walls of the Carm mags are thicker than the cover plate and walls of the factory mags, so I am guessing they would be too long in the Carm which has 10mm of depth for the pellet.
I'm not sure, I didn't ask him. If the carm magazines or his magazines are deeper than the factory ones then they will fit the polymags don't fit in the original magazine by like half a mil. But I am trying your temp tape method to se how it works for me.

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Maybe I should watch your video again. What I got the first time was that the round going in was jamming which is different from my problem with it pulling the 2nd pellet partially back out of the magazine when caulking it to load the next one.

Do the Firewalker mags work with the polymags? I don't have any of those on hand to try in my Carm mags but the outer walls of the Carm mags are thicker than the cover plate and walls of the factory mags, so I am guessing they would be too long in the Carm which has 10mm of depth for the pellet.
Well that was a bust, your temp fix didn't work out on my end. I got the same result as the video

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