[diamondd2]

Just picked up a new Glock 42. Test fire date 5/2015. New "02" mags, etc. Fired 200rds today of fmj. Slide failed to lock open on last round 6 times today (6 mags out of 33 mags fired).

Is this a known issue or was it possibly just me with my thumb interfering with the slide release/catch?

Also, ejection seemed terrible. Ejecting right, up, back, almost no ejections to the right. Normal??

Other than that there were no malfunctions, every round chambered, fired, and ejected.

 

[harold63]

If it's intermittent like you're describing and the ejection isn't good, I'd suspect it may be short stroking. What kind of ammo is it?

 

[HGxyz]

I could be wrong, but I would bet it's your thumb resting on the slide stop lever. I've seen this many times, but it's particularly easy to do with a small gun like the G42.

 

[cowboywannabe]

HA! not locking back on the last round is a blessing, as most folks have it lock back whilst shooting on the 2nd, 3rd, 4th, 5th rounds.....

 

[diamondd2]

If it's intermittent like you're describing and the ejection isn't good, I'd suspect it may be short stroking. What kind of ammo is it?

I was contemplating this as the problem also.

Geco 95gr FMJ.

 

[Hermanator]

Just picked up a new Glock 42. Test fire date 5/2015. New "02" mags, etc. Fired 200rds today of fmj. Slide failed to lock open on last round 6 times today (6 mags out of 33 mags fired).

Is this a known issue or was it possibly just me with my thumb interfering with the slide release/catch?

Also, ejection seemed terrible. Ejecting right, up, back, almost no ejections to the right. Normal??

Other than that there were no malfunctions, every round chambered, fired, and ejected.

Welcome to the club.

I'm on my 3rd G42 (no kidding, Glock replaced my original, twice). I've shot over 1100 rounds thru this 3rd one and it lock back on about every other mag or so. Mid mag mostly. Not just on me, a Range Officer and 3 others that have tried it. Don't believe the thumb hitting the mag release theory, it's a problem that Glock has not figured out, obviously.

I think think part of the problem is the Round Nose stuff as you will see others speaking of if you look thru other G42 threads. The XTP type of bullet does well, especially the "+P" ammo from Underwood.

Recently I've called Glock and explained it to the usual Tech guys and sense it is my 3rd one they "send me to a supervisor" who does not return my calls.

If I were you, I would call Glock and complain. They will send you a FedEx label for return and MAYBE fix it. I've read where others have had such good fortune, but not me. Best wishes and good luck! Herm

 

[Jim]

Welcome to the club.

I'm on my 3rd G42 (no kidding, Glock replaced my original, twice). I've shot over 1100 rounds thru this 3rd one and it lock back on about every other mag or so. Mid mag mostly. Not just on me, a Range Officer and 3 others that have tried it. Don't believe the thumb hitting the mag release theory, it's a problem that Glock has not figured out, obviously.

I think think part of the problem is the Round Nose stuff as you will see others speaking of if you look thru other G42 threads. The XTP type of bullet does well, especially the "+P" ammo from Underwood.

Recently I've called Glock and explained it to the usual Tech guys and sense it is my 3rd one they "send me to a supervisor" who does not return my calls.

If I were you, I would call Glock and complain. They will send you a FedEx label for return and MAYBE fix it. I've read where others have had such good fortune, but not me. Best wishes and good luck! Herm

You shouldn't have to be fixing Glock's problems, but many of us had no other choice.
You can do a search under my name just today and get the details of my "squeeze, then file if necessary" cure for premature slide stop. It worked for me on two different guns.