CM9 slide sticking back

[bboswell]

Shot my new CM9 yesterday.

First 20 shots or so went pretty well, after that the more I shot it the closer to a single shot it became.

After 225 rounds I have to hit the back of the slide after every shot to get it to close.

The slide release is not engaged the slid is just hung up.

I have oiled, over oiled, cleaned, shot dry, and re-oiled. I have looked at the lube chart posted and all points have been lubed.

What is the next step short of returning to the dealer?

[Tinman507]

Make sure the recoil spring is installed with the closed end toward the rear of the slide.

[bboswell]

Make sure the recoil spring is installed with the closed end toward the rear of the slide.

Is.

[Tinman507]

Try a call to Kahr CS. Explain whole problem to them. They may send you a new recoil assy to try out. If they say to send back in insist on a ppd shipping label.

[bboswell]

Locks all the way back.

Slide lock is very hard to remove during disassembly.

[JFootin]

Locks all the way back.

Slide lock is very hard to remove during disassembly.

Is the slide lock engaged when this happens?

[bboswell]

Is the slide lock engaged when this happens?

No it is not.

[jbwk254]

Are you sure its not something your doing? Did you have anyone else shoot the gun? I was at the range yesterday with my wife and she kept having this issue when using the +P rounds. She had no issues when shooting federal fmj 115g. Whenever I shot I did not have an issue. Just a suggestion..

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[bboswell]

Are you sure its not something your doing? Did you have anyone else shoot the gun? I was at the range yesterday with my wife and she kept having this issue when using the +P rounds. She had no issues when shooting federal fmj 115g. Whenever I shot I did not have an issue. Just a suggestion..

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3 of us shot it and all had the same issue. Shouldn't matter though, if a weapon is so finicky that you have to grip is a certain way then it is not fit for self defense IMO.

Since it is new I dropped it off where I bought it to let thier Gunsmith look at it. We will see.

[bboswell]

2 days in with no progress. Might have been better to send back to Kahr but I had hopes of using it for a CHL class Saturday.

I have owned MANY guns and several pistols and have ever been exposed to this "break in" BS.

I have 1000's of rounds through my Glock and my Browning without a single failure.

Really questioning this purchase about now...

[zamboni]

I know it sucks right now, but be patient. Once you get this gun working %100, and I'm sure it will get there. You will absolutely love the gun. cm/pm 9s are about the perfect carry gun imho.

[CJB]

I have owned MANY guns and several pistols and have ever been exposed to this "break in" BS.

Hey me too... bolt action rifles, slide action shotguns, revolvers.....

Seriously, getting a very small light and powerful pistol to work is no small feat of engineering and manufacturing skill. The REAL issue with the break in is the recoil spring and maybe some other few parts like the extractor, trigger bar creating a nice wear pattern in the frame, but mostly the recoil spring assembly.

They cannot pre-stress the springs in any cost effective way. Small, stout, short and strong springs will lose some tension upon use. Its not a matter of locking back the slide, but more a matter or rapid and repeated cycling of the slide.

The engineers and manufacturing dont make the springs as they want them to be, but rather, make them so they turn into the springs they want them to be (after some use). Springs have a decay life, and the most decay is on the front end of the life, then becoming much more level and even ... but still decaying. So those 200 rounds may lose the same spring tension as the next five thousand rounds do (made up numbers to illustrate the effect on the spring). The relationship is similar to my example though... you get a big decrease, then long gradual decrease with use. Thats how coil springs work.

So.... ya gotta give the very small, very light... very niche market... pistols a chance to become battle ready. Think of them as pistols enduring boot camp.

[bboswell]

[QUOTE=CJB;129830]Hey me too... bolt action rifles, slide action shotguns, revolvers.....
QUOTE]

I appreciate your snide comment and sarcastic smiley

I wasn't referring to bolt actions or pumps. I was referring to other compact simi-auto hand guns (1 smaller than this one) or other simi-auto weapons manufactured.

Other manufactures have managed to engineer around this break in period thus producing a firearm that is dependable from shot #1.

I know that had I spent time reading on this forum prior to purchasing this gun I wouldn't have this problem. With all the issues of fail to feed, fail to lock, broken magazines, picky about ammo, and people having to send their gun back to Kahr multiple time to get them to work I would have never bought a Kahr to protect me and my family.

I'm sure eventually they will get it running so keep your eye on the classifieds.

[Tinman507]

Have you spoken to Kahr CS yet? They're seriously good folks and truly want to make your gun right. No one here wants you to go away mad.

[bboswell]

It is still at the shop where I bought it. They have duplicated the problem but gunsmith has not worked on it yet.