Grand Power K100 problem

guninhand

guninhand

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It didn't happen when I first got it, but now my GP K100 holds the slide open when there are still rounds left in the magazine. Upon inspection I found that the problem has to do with the slide release. Normally spring tension keeps it in the down position. Lift it up, let go, and a spring somewhere brings it back down.

Now, as the gun cocks, after the hammer gets past half ####, there is no more spring tension on the slide. Then if the gun has been fired momentum brings the slide stop up, and there being no more tension on it , it stays up and locks back the slide, even though there are still bullets in the mag.:mad:

Anyone know a solution?
 
Dear Sir
I am personaly very unhappy, if somebody of users of our gun have any problem. Can you post photo of mags follover ? slide stop is under sprig pressure or not ?may you tell me the serial number of your gun ?
can i see photo of frame without slide? deatail of barel through?
i think, that slide spring is not in the correct position, normaly is in the overpress of the slide stop. probably it is out of this overpress, it is put out to trigger side, an when you push the trigger, this one lever up the slide stop spring.
probably you have hard push of trigger by reason of additional resistance of slide stop spring.
if yes, is neccesery push out end of slide stop spring from the trigger to slide stop overpress by some rod of skrewdriver trohgt the hole of barel through
sorry for my terrible english. i believe that you can understand me.
Yaroslav
www.grandpower.sk


guninhand said:
It didn't happen when I first got it, but now my GP K100 holds the slide open when there are still rounds left in the magazine. Upon inspection I found that the problem has to do with the slide release. Normally spring tension keeps it in the down position. Lift it up, let go, and a spring somewhere brings it back down.

Now, as the gun cocks, after the hammer gets past half ####, there is no more spring tension on the slide. Then if the gun has been fired momentum brings the slide stop up, and there being no more tension on it , it stays up and locks back the slide, even though there are still bullets in the mag.:mad:

Anyone know a solution?
Click to expand...
 
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k100 said:
Dear Sir
I am personaly very unhappy, if somebody of users of our gun have any problem. Can you post photo of mags follover ? slide stop is under sprig pressure or not ?may you tell me the serial number of your gun ?
can i see photo of frame without slide? deatail of barel through?
i think, that slide spring is not in the correct position, normaly is in the overpress of the slide stop. probably it is out of this overpress, it is put out to trigger side, an when you push the trigger, this one lever up the slide stop spring.
probably you have hard push of trigger by reason of additional resistance of slide stop spring.
if yes, is neccesery push out end of slide stop spring from the trigger to slide stop overpress by some rod of skrewdriver trohgt the hole of barel through
sorry for my terrible english. i believe that you can understand me.
Yaroslav
www.grandpower.sk
Click to expand...

Hi K100,

Glad you are here. I do not believe the problem is with the magazine because:

Remove slide with spring and barrel from gun. Insert loaded mag with hammer of gun fully forward, as if trigger has been pulled. There is spring tension keeping the slide stop down fully. Now insert empty mag, there is full tension on the slide stop, but it is in the fully up position.

Now insert a loaded mag and fully #### the hammer with thumb so the gun can fire. There is no more spring tension keeping the slide stop in the down position. As soon as the hammer, moving backward, passes the half #### position, all spring tension is gone from the slide stop. The slide stop is now free to flop between the two extremes of its range of movement.

If an empty mag is inserted, with the hammer fully cocked, the tension from the mag follower will keep the slide stop in the up position.

All this is with the top end completely removed. So you see that if the gun is reassembled and fired, the slide stop can get flipped up when the hammer is fully cocked, and keep the slide open, even though there are still cartridges in the magazine.

Gun ser no is c00092x


 
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From that picture and what you described, you need to take a small screw driver and push the spring leg (seen in the circular hole) towards the right side of the frame (up in the picture).

Right now that spring leg is resting on the top of the trigger where it pivots, as the hammer is cocked you will see it move. This is likely causing the loss of tension.

Let us know how it works out.
 
I have a K100 problem. I don't have one yet and I can't afford one right now.

The new Mark 6 version looks awesome and I can't wait until I've got enough money saved up. Any word on a .45ACP version? I'd rather have one in .45ACP than 9mm since I've already got so much invested in .45ACP gear.
 
Glad to hear the gun is up and running - no clue how that spring might have moved, but gremlins and things can happen easy enough, let us know if that happens again to you.

What kind of shooting do you do?



Any word on a .45ACP version? I'd rather have one in .45ACP than 9mm since I've already got so much invested in .45ACP gear.
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I doubt there will be a version in .45acp - it would not fit in the slide or the metal frame insert. It could be totally redesigned (scaled up xx%) but that would not make it as ergonomic.

I don't worry about the 9mm thing, but I do have a few special magazines that I keep loaded up with 9mm +P+ 115gr Silvertips, very accurate and very messy!
 
Mr K100, we are all feel happy for you to back up your design and share solution with us. This make us feel very comfortable to purchase your products in the future.

Trigun
 
IPSC...the only game in town in this neck of the woods.
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Well if you are running and gunning, maybe the spring leg got bounced out of its home when you were shooting?

Or maybe if you set it down hard or an RO dropped a slide or something.

Personally I've never had this problem, I only picked up on your problem because I have taken my K100 appart many times, just to see how it 'ticks'
putting them back together is always harder...

Wish I could offer a reason as to the failure, even if just to make me feel better, but please do let us know if it happens again.

cheers and happy shooting
 
Thamok,

I've never had the gun to a match and never did anymore than take the slide off. However the while before I had this problem I had the slide off and for some reason it was a while before I put it back on, and I forgot the trick of having the barrel far forward when reassembling, and was vigorously pulling back on slide to get it reassembled to receiver, and it wouldn't go, so I may have pushed something too hard and disturbed the spring. I suspect it is impossible to disturb the spring with normal shooting or dropping the gun.
 
What kind of accuracy are these guns capable of. I have a CZ75, but even though it is rebarreled with new barrel from distributor, it will barely keep 10 shots on standard target from bench rest @25 Yd. It is going back to DARK, who installed the new barrel but if that doesn't work out I am interested in the GP100 target model. Looking for something capable of shooting 2" groups. The rotating barrel lockup should be more accurate than tipping barrel system? What if your experience?
 
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