P380 Last Round Fail To Lock Back

[Ljutic]

I've been doing quite a bit of single shots with my P380 recently. I notice my slide stopped locking back recently. Manually retracting the slide works fine with an empty mag. The slide locks back great. It's not locking back under firing. Any ideas where I can start to resolve this? In the grand scheme of things, this is much preferred to a problem with pre-mature lock backs with rounds still in the mag. I'd just like my P380 to run as designed.

Thanks!

[csman22]

I just called support with a similar issue for my T9. FYI - I did not have any issues during my break in period and I'm about 2250 rounds into my T9..great gun..and I know this issue will be resolved. I have a TP45 with 100k rounds though it...flawless!

Regarding my similar issue... Fro my T9..I have a about 6 mags - 2 from the factory gun and I bough 4 new ones from 2 different resellers. The factor mags have "kahr" on the side, the new ones say 9 - 8 Kahr. All with new followers. (I got new followers because I broke a few on my own using a Tula loader carelessly, I had too much oil on a few...anyway) Only recently have I noticed all but one mag NOT allowing the slide to lock on the last round. When it fails to lock on the last round, I noticed the follower has traveld pass the slide lock area...the follower is basically to the right of the slide stop..up and past it. So...I called support. They were great. We talked about next steps.

The first step

- learn if all mags lock back on an empty slide? I have one mag (a 9-8 Kahr mag from a re-seller) where it does not work...but the issues is still happens on occasion on all other mags. So...he is sending me some followers to check if it still happens on the problem mag and others. For you..if you have this issue with only the 2 factory mags...maybe request or pick up a new one and see if you have same issue.

2nd step - inspect the mags to learn if any of them are warped in any way where the follower rests. Fact is...some of them may not have been Mfg correctly. If the follower can move in any way...it may not be catching the slide stop. The few I got from a reseller look like they have opened up a bit. So...I may have to replace some mags or...tI can request Kahr can send me one. But I agreed to just check the followers for now. For you...just check your current mags...again, maybe buy new one.

3rd - slide stop. Mine is forged not MIM...and it looks a little banged up... perhaps the slightest change on that little lip where it catches the follower is too rounded? So...Kahr is sending me a new one...just in case. For you...unless you notice any wear an tear, you may not need to consider replacing the slide stop

4th - slide spring. I have over 2250 rounds on mine...he is sending me another spring for guide rod...even though I told him I have one and I can replace it. Basically...he gave me one for free. For you... unless you have 1k rounds...no need for a new one.

So...I have agreed with the tech to use the new parts he;s sending me and do my homework. If I have any more issues...I'll send the gun back to them..and they will make me whole..."what ever it takes, you'll have a great T9...but lets do some testing first."

On a side note....I wonder if the springs on my 9mm mags are too strong. perhaps that;s what's ramming the follower passed the slide stop on the last round? My TP45 mags springs are really light compared to the 9mm...but...the tech does not think it's the springs at this point. I do not store my mages loaded...but I am doing that now just in case my hunch is right. But..that's doubtful.

Finally.. I'm very pleased with Kahr support. My guy was asking me questions and being methodical and we have a plan in place to get the issue resolved. Good luck on your end.

Clark

[JFootin]

Did anyone notice? Jocko's record has been broken! csman22 says he has put 100k rounds through his TP45!

[csman22]

I meant 1k rounds. doh!

[HDoc]

In my case failure to lock back after last round in my P380 appears to be ammo related.
Always happens with WWB, Federal and Remington FMJ. Never with PMC,Blazer or S&B. Go figure...

[Cokeman]

Mine happens with Remington UMC.

Give is the history on the gun. How many rounds? Have your mag springs become weaker? How does that little spring that sits under the slide stop look? Does this happen with all ammo or certain kinds?

[HDoc]

Mine happens with Remington UMC.

Give is the history on the gun. How many rounds? Have your mag springs become weaker? How does that little spring that sits under the slide stop look? Does this happen with all ammo or certain kinds?

Have about 1000 rounds down. I don't believe this is a magazine issue as
the failure to slide lock back happens with all three of it's mags.
Modern small guns have amazingly tight milling specifications. So do cartridges and the type and degree of powder and bullet castings they use. Normal variance between units can have large consequences. Ambient temperature also plays a part. Assuming nothing is out of spec, I'm happy feeding it the ammo it wants. It works flawlessly with it. Lord knows there's plenty of variety.

[rogerthedodger]

I installed Keltec+ mag springs, it cured my lock open on last round failures with the 6 round mags.

[Cokeman]

Have about 1000 rounds down. I don't believe this is a magazine issue as
the failure to slide lock back happens with all three of it's mags.
Modern small guns have amazingly tight milling specifications. So do cartridges and the type and degree of powder and bullet castings they use. Normal variance between units can have large consequences. Ambient temperature also plays a part. Assuming nothing is out of spec, I'm happy feeding it the ammo it wants. It works flawlessly with it. Lord knows there's plenty of variety.

I know why your gun does it. It's clinically insane. ;)

My second sentence was directed towards Ljutic.

[Ljutic]

Mine happens with Remington UMC.

Give is the history on the gun. How many rounds? Have your mag springs become weaker? How does that little spring that sits under the slide stop look? Does this happen with all ammo or certain kinds?

I really have no idea how many rounds. I'm not good at counting and keeping track on any except one and that's not a Kahr. I was using a brand new mag so I know that's not it. It was doing it with a used mag previously. Slide stop spring looks fine. Last week it happened repetitively with 4 different SD rounds.

I'll give it a good cleaning and try again. I think I may have skipped cleaning it up after my last trip before this one and it may have been a little gunky.

[Ljutic]

I installed Keltec+ mag springs, it cured my lock open on last round failures with the 6 round mags.

I'll try this too. KelTec is becoming the Wolff springs of the micro gun world. Their PF9 spring has been a real lifesaver for Diamondback DB9 springs that age poorly. http://mousegunaddict.blogspot.com/2012/03/my-fix-for-my-diamondback-db9-feed.html

Thanks for the tip.

[TominCA]

I had some issues also and changed mag springs to some wolf replacements - worked fine - I suspect its the little retainer spring for the slide stop which has moved or lost tension in some way - Its a feature I don't think much about.