CM9 - From Great to Awful to Great!

[Devo]

I did what jocko suggested and took the magazine apart. I may have found something interesting, but it also maybe just how it works. I am hoping you can tell me if this is a significant find.

So I removed all the internals for the magazine held it upside down and the follower fell smoothly through to the top the magazine.

I inserted the shell of the magazine into the CM9 and turned the CM9 upside. I inserted the follower and thought the follower would behave the same. It got hung on the metal portion of the mazagine release that fits into the right side of the mag. Maybe this is normal or maybe it is not?

[jocko]

now would you think it should be normal?? The worst u can do is ruin a follower, the best u can do is possable file/sand that right side in that one area where it slides freely inside the magazine when in the gun itself. Even if that does not solve your issue, u have now made that magazine totally smooth from round 1 to 6. It might indeed hit on some and still pass by easily, where as with some it might just get hung up there enough before it passes through to actually prevent the round from presenting itself to the slide interface bar that picks up that round and feeds it into the chamber. Like I told you, I am not sure it is a cure or not but my PM9 does not do that and I have never had to modfy the followers or magazne release. I would think that follower should glide by with ease. No doubt with a compressed spring it does have some power behind it to move it past that magazine release button if it is causing it to stick, but we don't know if there is slight catch before it moves on by either. so if it was mine I would flle the right side just in that one area slowly, then fine sand it smooth and retest like u did.

[TucsonMTB]

At the risk of annoying Jocko by agreeing with him . . . please let me add that with my PM40, sanding down the followers in the area Jocko indicated where there is already a relief molded in, plus a little of the area toward the front of the follower including the skirt, eliminated my PM40's issues feeding 180 grain Winchester Ranger JHP ammo. Like Devo's pistol, it would nose dive after the second round. Yes, even before the mod, it was trouble free with 135 grain Winchester Ranger JHP's. The 135's have a more slender profile, more like 9mm's, and appear to be a tiny bit shorter.

Speaking of Mr. Devo . . . thanks, your empty magazine tube follower test works great. I had one magazine that was still occasionally a little picky. It failed your follower slide test when I tested it this evening. After a few minutes with a file and some 800 grit wet-or-dry production paper, it now passes that test. I'm willing to bet it will join the ranks of the other mags that work perfectly all of the time. By the way, my other 100% reliable magazines also passed your empty magazine tube follower drop test. Life is good!

Ya' know it's really easy to learn things on this forum. Thanks to both of you!

[TTPower]

i think this is the 1st CM9 that encountered a problem in this forum. i hope OP figures out the problem.

[jocko]

I think ur right, hoefully we can get this solved here and not back at kahr HOPEFULLY as I stated earlier, this magazine fix might not be a cure all BUT we know it should not be hanging up the followers either, so doing alittle TLC to the mag followers if needed surely will or shoud you peace of mind that the magazines are now perfect and any issue coming after that should eliminate the magazines being a potential problem. I sur ehope it helps him get his littlle gungoing right..

[CJB]

Just for grins, check the overall length of the cartridges that didn't work, if any are left over. Compared them to the ones that did work. Short rounds nosedive, and they don't have to be all that short either.

[Devo]

I called Kahr and explained the follower is catching on the magazine catch. Kahr is mailing a new magazine catch body for me to install. If the follower slides correctly it should be good for all mags purchased in the future. I will update this thread with the results of the magazine catch body replacement.

[jocko]

, ow instead of installing the mag cartch, whyn ot just proceed to file a tad off the follower.

[Devo]

, ow instead of installing the mag cartch, whyn ot just proceed to file a tad off the follower.

I decided since the PM9 magazine jammed as well, but works in the PM9 the issue is most likely with the gun and not the CM9 magazine. I thought it would be dealing with the symptom and I might be dealing with the symptom for every magazine I purchase.

I would like the CM9 magazine run through the PM9 to prove out my assumption.

If the new mag catch has the same result, it's time to file.

[Bawanna]

Sound logic in that plan. They should all work. You can always fall back on the file and sandpaper if the need is still there.

[TucsonMTB]

I decided since the PM9 magazine jammed as well, but works in the PM9 the issue is most likely with the gun and not the CM9 magazine. I thought it would be dealing with the symptom and I might be dealing with the symptom for every magazine I purchase.

I would like the CM9 magazine run through the PM9 to prove out my assumption.

If the new mag catch has the same result, it's time to file.

Inescapable logic, but installing a magazine catch with a little less reach to clear the plastic follower will mean a little less material holding the mag in place. One could easily just grind back the existing catch a little. But, it's embarrassing when a magazine drops out unexpectedly. I decided not to risk it.

Yes, I had to spend 15 minutes with each of my small collection of magazines to disassemble, sand (Dremel first, followed by file and sandpaper) and then test and reassemble each. But, it might have taken more total time to replace the magazine catch and then test the pistol and the magazines, all the while wondering about the increased chances of dropping a magazine unexpectedly.

However, it is your pistol, so you should do whatever you like. Last time I checked you did not buy your CM9 to make me happy.

[CarlCyrus]

The rounds definitely tend to move forward in the magazine, especially if you do a chamber check with a full magazine in there.

Make sure the mag and the ammo has absolutely no lube/oil on them. If there is a trace, the rounds can move forward.

Carl

[Devo]

Kahr really doesn't seem to want me to send this pistol to the factory so they sent me a magazine catch in the mail. I asked the day they mailed it does it come with installation instructions. They said they would talk me through it. The problem is their work hours are my work hours. Anyone know how to remove and install a magazine catch for a CM/PM 9?

[gb6491]

Kahr really doesn't seem to want me to send this pistol to the factory so they sent me a magazine catch in the mail. I asked the day they mailed it does it come with installation instructions. They said they would talk me through it. The problem is their work hours are my work hours. Anyone know how to remove and install a magazine catch for a CM/PM 9?

Towards the bottom here:
http://kahrtalk.com/showpost.php?p=15667&postcount=2
Regards,
Greg

[Devo]

Towards the bottom here:
http://kahrtalk.com/showpost.php?p=15667&postcount=2
Regards,
Greg

Exactly what I needed. Thank you.