Glock problem... magazine related?

K

krept

New member
I recently installed a pierce +1 grip extender on one of my magazines for my G27. After cleaning the gun, I tested the various functions. It turns out that the slide stop lever is not stopping the slide when it is retracted while an empty magazine is seated.

The normal G27 magazine I have will accuate the lever. The followers on both magazines appear equal. The springs on both magazines are relatively new, both being roughly a year old. It was my understanding that the mag springs on the G27 is the same as those on the G23, so the added distance of the Pierce extension shouldn't affect the function no?

Again, this doesn't seem like it would be a critical problem that would cause a misfeed or failure to fire, etc... the only problem I believe it would cause would be not locking the slide back after the last shot. Thing is, I haven't had any problems in the past (even with the larger Scherer +1 extensions) and do not want one now.

Could it be time to replace the springs? Last time I fired the G27, the brass seemed to be hitting in the same spot as it did when it was new. The spring for the slide lock lever shouldn't be bad, as the mag w/o the extension hits it fine.

Any comments?
 
First: did the magazine you put the extension on work properly before you put it on? If so, you know it's extension-related (obvious).

Make sure the follower & spring are correctly reinstalled (obvious). Try to cock the follower back & forth on both mags, and note any difference.

Get a good, strong desk lamp; open the slide slowly on the bad magazine and look in there and see what is (or isn't) happening. Compare that to a properly functioning mag.

Is the magazine seating fully? Check for interference around the edge of the mag well.
 
I have not had the chance to try out the Pierce extension, as it was recently purchased... this was the reason why I tried to function test it.

Magazine is seating properly, but when I looked at the follower/slide stop lever interface, the follower was only slightly pushing up on the lever, not enough to get it to catch against the notch in the slide. My first thought is that it was a spring issue, as in the spring not having enough force to properly engage the Slide stop lever... thing is, the pistol has had less than 1500 rounds through it (@ 750 per mag) and I have never left the magazine stored loaded longer than 1 month (out of habit). All parts except the mag extension are OEM.

I have not messed (tweaked) either the magazine spring or the slide stop lever spring. I guess it really is just a process of elimination involved... for the time being, the extension is staying off (as it should until proven reliable). I've had no problems with the larger scherer extensions...
 
I had this problem before your spings are now too short get a wolf mag spring thats extra power and it will work fine.
PAT
 
Thanks Pat. With extra power springs, I'm going to need a jackhammer to fit all the rounds in the G27 mags. Any idea what the standard spring weight is?
 
Remember that magazine tension is extemely critical in all brands of pistols. It sound to me like you need either a new spring and if the spring is new then you need a more powerful spring.

You are not the first person I have run into that had problems with magazine extensions in the glock.

A friend of mine put one on his glock and he was using the old style Glock magazine with the flat solid floor plate. He droped the magazine and it flew apart.

While the bafoons on this thread howl from the roof tops that this is not possible take a look at the old style magazine. When removing the floor plate all you have to do is squeeze the sides of the magazine. Any flexing of the magazine in a hard fall on the old style design will cause it to lose its floorplate.

Make sure that you have the newer style magazine with the hole in the middle of the floor plate and the corresponding retaining button located in the middle of the floor plate. This was done to prevent the magazine from coming apart when droped.

This will be very important if you install a heavier than normal spring to ensure that it pushes your follower up when empty. Remember you now have more room in the magazine and the original spring is now weaker.

I have seen weak springs (recoil spring) even allow the last round to pop out of the magazine and also cause the slide to open prematurely under recoil especially when hot loads were used.

Again the magazine spring and the recoil spring are both extremely critical in the funtion of any weapon. Either one getting weak can cause a lot of strange and serious functioning problems in any brand of auto pistol. W.R.
 
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