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I took my ps-90 out to the range today. My magazine broke though. Basically it won't chamber the last two or three rounds. I think something may have jammed in the magazine body. As the rollers just roll around free. I tried to take it apart after I got home to figure out what was the matter with it. When I took off the end the spring won't come out. I don't want to yank it out. Anybody have this problem before or know a solution?

As far as the shooting goes it was a pretty good gun to shoot.
 

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That is strange. I'd call:


Bob Ailes
FN Customer Support Manager
703-288-3500 ext. 122

He will fix U up. I will say that your experience is not typical. Sorry you were one of the few that experienced a problem. I've had my share of that with other guns...
 

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New magazine or has it been used before? If used, was it taken completely apart and cleaned? Do the first five or so rounds go into the mag easily or do they have to be forced?
 

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Well it would seem that I am not alone with this magazine problem.

Out of 7 brand new magazines, 2 of them are having the same
malfunction.

The follower that is attached to the spring seems to get jammed
into the top/side/bottom? of the magazine and the 2 rollers just
roll around with the last 2-3 cartridges.

I pulled them apart and tried a little graphite on the rollers and
the follower. No good, same malfunction.

I did find however, that tapping the end of the magazine on the palm
of the left hand will free up (read cause the follower to again push
against the rollers) and the last 2 cartridges are in the firing position.

I have found this same malady way back when in the AR/M16 series
of magazines whereby some weld or too much phosphate on the
magazine will cause the follower to jam.

Oh and as an aside, all of these magazine were 30 rounders transformed
into the 50's (or 49 round in the case of all of mine).

Any suggestions gentlemen?


Art
 

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I have 9 mags and have never experienced this - so I have no suggestions to offer. See if FN will replace the offenders for ya.
 

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I would say that the follower is catching on something in the mag. Pull it all apart and see if there is a small imperfection in the plastic that needs to be filed down. Also look at the follower. It might be a tad to big for the mag. It won't hurt to file the edges a little so it does'nt bind. Good luck and let us know if this fixes the problem. :)
 

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M1P90

Thanks for the suggestion, however I tried that yesterday.

No real difference that I could see from a 'good' magazine
and guts to the 'bad' magazine and guts.

I did 'fix' one of the offending magazines quite by accident.

I micced the follower, both rollers (good mag & bad) and could
find no differences, so looking down through the magazine body
the thought came to mind to 'tweek' the upper (read slanted protrusion)
on the follower, and to my utter horror I broke it off! Thankfully all
my children are grown and were not in the house at the time as I
ranted on & on for numerous minutes in the gun vault, at quite high
volume.

But, Ya-ta-hey, put it all back together, and suprisingly enough, it
functioned perfectly.

All I can think is there must be some small imperfection in the magazine
body that was causing the follower not to go into complete 'battery' against
the 2 rollers.

Needless to say, I DID NOT 'tweek' the other malfunction follower.

I'll do some further looking, testing tonight, as cooler heads usually
prevail.

Art
 

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M1

Sure did, no they roll around free when the follower 'gets caught'
in the last few cm3 of the magazine.

Taking the mag apart and re-inserting the 2 rollers and then the follower
(attached to the spring) it feels like it needs to get over a hump in the
mag body.

I'll look at the offender when I get home this evening and look everything
over again.

Thanks Brother for your suggestions!

Take care'

Art
 

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Problem solved.

After trying a follower that functioned perfectly in another magazine, I
tried it in both of the mags that were jamming, both functioned with
no binding what-so-ever with that follower. There were no noticeable
differences between it and the followers that were binding.

I finally concluded that the points on the bad followers were not as
rounded as the ones on the good follower, so I rounded them just
slightly, also took the bastard cut file and smoothed the bottom (read
the pointed bottoms) ever so slightly also. I made sure to remove
any of the plastic that the filing had created, especially at the inner
portion of the points.

Tested 15 rounds by hand, no binding, loaded 49 (thats all these will
hold) no binding and functioned perfectly. I went ahead and did the same
to the other bad follower and had the same result.

Went outback with 3 magazines fully loaded (the 2 that had not functioned
and a 'known' functional mag. all good to go!

So the magazine body was not the culpret, just the follower.

Hope this helps


Art
 

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AGG

Mine are not.

I got 6 30 rounders straight from Natchez Shooters Supply. They also
have the 50's, but those are $6 more. I took the Dremel to the center
section of the 30 round 'plug' (if you will) and cut both ends off and
reassembled the magazines. using both ends.

Now all run with 49 rounds of ammo. Reliably.

On a side note, After taking a long look at all of the magzines I have
for the PS90, I find that the magazine that came with the weapon
appears to have a few 'bubbles' (read small air pockets) in various
places in the magazine.


Art
 

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What was left after U cut it must be slightly too big if U can't fit that last round. Up to u if that 1 round is worth buying those pieces to convert the 30 rounders to 50 rounders. I got mine from Mag Parts in Dec 2006. Works 100%.

In fact - After testing out each mag to make sure they worked, I only use the 1 mag over and over - to save the others. I use the converted mag all the time.
 

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ShipWreck

Thanks for the thought... However I checked into that also, No the loss
of 1 beebee is not a problem.

I could rectify the loss by not using the inner portion (that attaches to
the spring) or doing a tad more smoothing on both ends and regain the
1 beebee, but its not a biggie.

This toy is a hoot to shoot!

I do wish some factory brass was available for handloading, but suffice
to say, I already have some 'testers' loaded up ready to try the next
time I go shooting.

Thanks again,


Art
 

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I wonder if there was a "different" manufacturing/design process between LE and non-LE marked magazines?

Tony
 
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