That looks like it may have been an instance of excessive pressure.

Maybe a reload with a double charge of powder, or a round that had been chambered too many times for duty, eventually forcing the bullet back into the case, reducing the case volumeenough to crank up the pressure beyond a safe level.

Gotta rotate that ammo guys.
After a few times through the chamber, send it downrange.

Erie County (Pennsylvania) Sheriffs Deputies: Sig or Glock 9mm

Brooke County Sheriff - WV - Glock Model 22 .40 S&W.

Never had any seriousproblem with any of them - 2 jams in 9 years - both this year using Wolf Ammo. Both were a failure to extract and had to knocked out using a cleaning rod. No more Wolf Ammo for us. Shot all kinds of other junk without problems. 17 guns 21 guns total issue.

Also use model 27 glock for back up for most of the guys that carry back ups.

I'm a Department amorer. Glock class 3 times now and counting, lol!!

Haven't seen any other problems or concerns others have commented on here.

In addition, many of our guys are using the M3 tactical lights mounted on the rails of the glock . 40 as part of their norma duty rig. 2 years now and they seem to work fine as well. We have had a 2 lights fill up with water one dark and stormy night during a siege situation, but other than that they are working well.

The only concern is that the holster for this combination allows access to the trigger while the gun is still in the holster. - bad news, but no problems so far.