Slide Release Lever

Discussion in 'Gunsmithing Forum' started by Polygon, Apr 18, 2012.

  1. Polygon

    Polygon New Member

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    I have a Kahr PM9. It's having some failures to feed where the slide locks back as if the magazine is empty but the round is nose down. It's as if the bullet it hitting the slide lever. This is a known issue with the PM9 and a lot of people file them down to correct it.

    The question is, how should I go about this? I don't want to remove too much. Also, what kind of file should use?
     
  2. lonewulff

    lonewulff New Member

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    You try youtube? Lots of gunsmiths (self proclaimed and professionals alike) are posting how to videos. Shpuld be able get at least some idea from that.
     

  3. Rick1967

    Rick1967 Well-Known Member

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    Is this a new gun? Or is it old? That soulds like you could have a dirty mag. I have seen dirty mags that are slow coming up on the last round causing a similar problem. I have noticed that on a lot of 1911 mags. But I would think it could happen on any semi auto.
     
  4. Polygon

    Polygon New Member

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    That's not a bad idea. I'll give that a try as well.

    It's a new gun. It's only had 200 rounds through it and it's done this four times. I cleaned both magazines per the guide on the Kahr forums and well as the gun prep guide. And it's done it with both magazines.
     
  5. Rick1967

    Rick1967 Well-Known Member

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    Have you contacted Kahr? I have the CM9. I know yours was more expensive. Perhaps the manufacturer could shed some light on the issue. Especially if it is a known problem. I would not take a file to a new gun myself. Old guns are a different story.
     
  6. JohnJak

    JohnJak Member

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    This is what we would do.
     
  7. Polygon

    Polygon New Member

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    Normally I wouldn't either. But it's a known issue and this seems to be how just about everyone has fixed it. I've been in contact with Kahr and they want me to send it in. I talked them into sending me the lever, so I have a spare lever.

    That way I can see if this works. If not, I have a factory new one I can put in.
     
  8. Tackleberry1

    Tackleberry1 New Member

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    It sounds like your prepared to break out the file, let us know how it goes and pleas post picks of the "post filed" part along side the factory new part, "assuming it works".

    I got a call yesterday, friend of a friend having a similar issue with a new CM 9 which surprised me because I knew the P380 had a similar issue but I've had my PM 9 for 5 years now with no problems.

    I believe the slide lock on the CM is MIM and assumed the gun I heard about yesterday came from a bad run that got slightly out of spec slide locks?

    I think a light filing would solve the problem. Personally I'd do it at the range where I could take off a little at a time, reassemble and test fire until I thought I'd solved the problem. I'd then put a minimum of 250 rounds through it to make sure.

    Good luck.

    Tack
     
  9. Polygon

    Polygon New Member

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    Yeah, I'm a hands on kind of person and I don't want to wait months for Kahr to hopefully figure it out.

    So, would you suggest any specific file to use? I have a bunch of huge ones that I use for automotive stuff that aren't going to do me any good here so I'm going to have to get something. I just didn't know if there are specific files to gunsmithing I could get or if I can use any small file.
     
  10. Tackleberry1

    Tackleberry1 New Member

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    I've ever tried to file an MIM part and don't know if your slidelock is MIM or forged but to be safe, I'd start by stealing the wifes Emory board for her fingernails. If that's too soft I'd go to a metal nail file over a clean white piece of paper and just take a little bit at a time between test fires.

    Tack
     
  11. Polygon

    Polygon New Member

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    Yeah, not sure if it's MIM or not. I'll give that a try and see how it goes. Make a couple of passes and test fire it until I don't get any more FTFs.
     
  12. roscoguy

    roscoguy New Member

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    It does sound like the same issue I had with my P380. I found the same sort of info you mentioned: filing the little tab that catches the mag follower. I did mine in 2 stages so that I wouldn't over-do it. The 1st time, I filed about .008" off. This seemed to help at 1st, but the same thing ended up happening a few more times, so I filed off about the same amount again, for a total of ~.015-.016".

    You could probably use a jeweler's file or similar, but I already had 4" & 6" smooth files. Either one would work. The nail file isn't a bad idea, but it might not work very long on a relatively tough part like the slide stop lever. If there's a discount tool store around, you should be able to find something for just a few bucks.

    Just be careful - go slow & try to keep the same angle on the little tab. You may not need to take off as much as I did, so maybe test it after .005" or so. Like they always say, it's a LOT harder to put a little bit back on. ;)
     
  13. Polygon

    Polygon New Member

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    Thanks for the tips. I'm going to get a small file this weekend so I can get started on this. Then it's just a matter of finding time to get to the range to test it out.
     
  14. Polygon

    Polygon New Member

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    So, while filling up my new range bag today I deiced to do some investigating and check to see how close the round is coming to the slide lever. I deiced to stick three rounds into the magazine and first check with the rounds pushed all the way back in the magazine. Then check after chambering a round. I did this because I noticed that after chambering a round the next round was pulled sightly forward in the magazine.

    First I checked with my carry rounds, Hornady Critical Defense 115gr. With the round all the way back it has no chance of hitting the lever. After one being chambered it's decently close but I don't think there's a possibility of it hitting the lever. I wasn't too worried in the first place considering the shape of the round.

    Next I checked with the ammunition I used to break it in that this has been happening with, Remmington UMC Target 115gr. All the way back it's already pretty close. After chambering the first round it's really close. I can see any small variance causing it to trip the lever. I honestly think this has been the problem all along.

    Lastly I checked with some ammunition that I was planning on trying to see if I could rule out ammunition as a problem, Federal Champion 115gr. It was even worse. It was only slightly further from the lever on the first round. After chambering the first round the second round was clearly hitting the lever.

    After doing some more research it seems that this gun was designed around 124gr rounds. So, I'm going to pick up some 124gr rounds to test with as well. I have to go to the store today and I'm going to find me a small file and get to work.
     
  15. lonewulff

    lonewulff New Member

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    Wow I would definitely check that out first. If in fact it is the ammo I would pass that along to the manufacturer.
     
  16. Polygon

    Polygon New Member

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    Oh, it's a known issue. They're well aware of it. They stated that there were some slide release levers that were out of spec. I might pull out the new one they sent me and see if it's any better.