New Yugoslavian M70AB underfolder has mag fit issues...advice/help?


April 9, 2010, 06:56 PM
I picked up my new Yugo M70AB Underfolder. Looks good.

The problem is that I cannot seat all of my mags in it. Some just quite simply do not make it far enough to the catch. Some, however, do just fine, but fight so tightly that removing them requires a good squeeze of the hand.

I'm guessing the magwell wasn't cut to allow any extra space.

In comparison, all of my mags (Romy, Hungarian, Pronag, AND Tapco) all worked in my converted Saiga.

Any idea as to what may be the problem and if it is easily fixed? There is no correlation between mag type either; it works on some Hungarians, Romy's etc. then not on others of the same type.

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April 9, 2010, 07:25 PM
Get "mag well" out of your head. Continuing down that line of thought may get you to "Century Special" status (and it's not very special).

It sounds to me as if your mag catch was installed a teensy bit too high for general purposes.

Ohio Gun Guy
April 9, 2010, 07:31 PM
I had that issue on a WASR. Half of my steel mags would work just fine; the other half were somehow sligtly wider. I just looked at the gun and could see the problem. I filed the mag well and they all work fine. You should be able to see what the problem is. Just check & double check before doing anything drastic.

April 9, 2010, 10:13 PM
Well sheesh Nalioth...if you're gonna command like that :mad:;)

I'm assuming you're right as usual. I'll see if I can get pics up in a few days, but now I have to leave for 'vacation' and won't have internet access til Sunday night.

But I'm guessing it'll be safer and easier to simply file down the mag catch, right? I'd rather fix the gun and not 'fix' my mags. Or would the most prudent, non=stupid thing to do be to take it up with Century...?

edit: also, the dust cover is so much more complicated to get back on. Took a bit to figure out. :o

April 10, 2010, 11:09 AM
I received my M70AB2 from Atlantic firearms two days ago and am experiencing the exact same problem. I contacted Atlantic firearms yesterday regarding the issue and was informed via email that someone would be contacting me by phone that day to see how the issue could be resolved. Btw, is your gas tube release lever *extremely* difficult to move?

Still waiting for that call.

This is my 2nd ever AK purchase. The 1st one is a Lancaster AK74 and I am currently dealing with Atlantic/Lancaster regarding the defects on that rifle as well. (I wont go into details, the Lancaster '74 Debacle has been well documented on many internet forums, including THR.)

Anyhow, if you get it figured out please post. At this point I am seriously considering refunds/chargebacks. Good luck.

April 10, 2010, 11:45 AM
Upon closer inspection it appears that the area directly above the "lug" (don't know if that is the proper term or not) on the magazine is binding against the magazine well before the lug can lock into place. It looks as if the problem can be remedied by filing away just enough enough material from the area above the locking lug to allow it to clear the magazine well.

Does it sound like I'm on the right track?

Apologies for the imprecise description but I hope you all get the gist of what I am saying.

April 10, 2010, 12:43 PM
Apologies for the imprecise description but I hope you all get the gist of what I am saying. A picture is worth a thousand words.

April 10, 2010, 01:54 PM
Did Century make any of the Yugo guns with a magazine area cut for single stack only like the ban compliant Wasr-10 rifles??

April 10, 2010, 02:00 PM
Subscribing to this thread. My Vector/Polish AK has the same issue with some mags.
The thought of filing the gun instead of the mags makes me nervous but if that's what it takes then that's what it takes.

April 10, 2010, 03:13 PM
I don't know if RP88's situation is the same as I'm having but it sounds like it may be. I snapped some pictures of the gun and mags.
The mag on the left locks in place no problem. The magazine on the right does not, it can't quite reach the magazine catch when rocking the mag back to lock it in.
The 4th picture shows the only noticeable difference in the mags, in the front the cutout for the receiver appears to be a little higher and narrower, and the bump above it is a little fatter when viewed from the front or looking down from the top.

April 10, 2010, 03:18 PM
These pics show how close it comes to locking in place at the rear.

April 10, 2010, 05:10 PM
Did Century make any of the Yugo guns with a magazine area cut for single stack only like the ban compliant Wasr-10 rifles?? No.

Century uses Nodak Spud receivers in their domestically produced AKs, which are notorious for being tight in the mag well.

April 10, 2010, 07:30 PM
Double Tap Drew:

That is EXACTLY the problem I am having. your pics illustrate the issue perfectly. My yugo game with a Tapco polymer magazine and a steel one. The Tapco can be forced in but is very difficult to remove. The steel will not budge. It looks exactly like the does-not-fit in your picture and hangs up on the same area abv the locking lug.

Atlantic Firearms
April 10, 2010, 09:25 PM
Sounds like the mag catch may need to be filed down and is a bit out of alignment .

April 11, 2010, 02:18 PM
Anybody know what the gap is supposed to be between the receiver and mag catch? Mine is showing .205"

Atlantic Firearms
April 11, 2010, 03:43 PM
Look at the top of mag latch tab , some times these will be uneven and a bit taller on one side than the other . Usually this can be lightly filed down to allow the mags to easily lock on this has been a common issue on kit built AK rifles . We have also seen the same thing on Saiga rifles & Shotguns but it seems to be hit or miss.

April 11, 2010, 04:14 PM
Having owned more US built AKs than I can remember, I can say it is quite common to need some metal removed from the top of the mag catch. Some builders set their catch high on purpose to cover variation in AK magazines having different thicknesses in the catch lug. Better to have too much metal there than not enough. If you ever get a catch that sits too low it is a pain to fix. Been there a couple times and do not want to go again.

Typically I filed the catch down slightly, testing as I went with mag that would fit with effort/force before filing. On some guns where the catch was just barely too tight, I used a flat bladed screw driver and pressed down on the top of the catch by wedging the blade between it and the receiver. That rolled the top of the catch down just a bit (or bent it inward) and was enough to make the difference. The problem with this method is that if the entire assembly is not riveted well, it may pull loose from the receiver.

You could modify the mags, but that can be an endless chore if you have a lot of them--not to mention they may fit another AK differently.


April 11, 2010, 06:46 PM
Mine is even so I guess I'll try filing. Haven't decided whether to do mags or the catch yet, I've got 4 that don't fit and 6 or so that do. I just worry the ones that do fit will become wobbly/rattle if I remove metal from the gun (they lock nice and solid now), so I may try the mags first. Maybe I'm approaching it wrong, it's an AK not an AR, I just need a bigger hammer :D

Atlantic Firearms
April 11, 2010, 08:16 PM
Poly AK mags are normally slightly out of spec & over molded to allow for wear.

April 11, 2010, 10:56 PM
So I compared. Thank you Nalioth for the advice. I did not need a micrometer, though, since the differences can be observed by the naked eye.

EDIT: The problem does not seem to be an out-of-spec mag catch. I tried to simply insert a mag with the catch held all the way down (something I should have tried first...oops) to make sure I needed to file the catch, and it turns out that what is catching is the back of the mag (that little metal ridge that comprises the mag's "catch notch" or whatever). After a better look, the problem seems to be either: a) the mag catch's rivet plate, which looks like may be poking out and over the back edge of the well by a fraction of a millimeter (barely noticeable, but I can feel it with my fingers compared to my Saiga); or b) the mag well is in fact too damn tight. I'm inclined to go with choice A upon more diligent observation with a magnifying glass. I'll file that down a tad and see what happens. If not, then it looks like my blind first guess may have been right after all.

April 13, 2010, 01:50 PM
I spoke with Blaine at Atlantic firearms today. The rifle is being returned to Atlantic in the morning via their shipping account. Upon their receipt of the tracking info they are sending out a replacement rifle to my FFL that has been hand checked to make sure their are no magazine fit issues. And they are reimbursing me for the FFL transfer fee.

How's that for service?

April 13, 2010, 04:04 PM
Thats good to hear.

The good news with my Yugo is that an hour of handfiling the back part of the well and the rivet plate of the mag catch made it so that all mags do in fact fit now. They still fit rather tight but don't require a hammer to release. I still need a range report. I cleaned it out, and dear lord as it dirty; grease, what appeared to be cosmoline, and what was also either light rust or copper wash was present.

I'll take it out for some range time tomorrow. Everything else on the gun is perfectly fine from the outside, so all that is left is to make sure it shoots in an AK-esque straight line :)

April 13, 2010, 07:24 PM
I bought a Nodak Spud receiver for my AK kit and at first noticed the magazine wouldn't go up anymore at about half way up the mag latch... Sooo having a power tool in my hand I ground down the mag latch to fit the mag....this was a mistake.... after I had the gun together and was looking it over i tried to feed a dummy round i have for a didn't feed with the factory new Hungarian steel 20 round mag or my factory new Bulgarian composite 40 rounder... the problem was that the mag well on the spine of the magazines was getting caught and stopping both mags short of the top of the latch. I ground the mag latch too much so it wouldn't feed unless I held the magazines up against the RPK when firing.... I had someone weld some more metal to the top of the latch and I'm hoping it feeds feeds with me operating the action but i haven't tried firing it yet...

April 14, 2010, 04:54 AM
I guess I got lucky. My yugo fires like a dream and came very clean and in good condition. Only bad thing was that I had to do a major adjustment to the front sight post, but thats to be expected and very easy to fix. All mags I shove in this little beauty are received with open arms like the Americans marching into Paris.

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