Home Forums Hunting & Shooting Handguns Glock 27 kaboom

my son was shooting up some older factory 180 grain .40 cal FMJ yesterday and out of the last magazine, he had two failures to fire, which he ejected, and then a kaboom. He was not hurt at all, but says it was very loud and the pistol locked up tight.
He brought me the pistol, but not the cases or ammo or magazine. I managed to get the Glock apart, and it appears the recoil spring is broken. I have been shooting Glocks for years, and though I have heard of this, I have never seen it before.

Maybe one of the failures to fire left a little something in the barrel?

My thought, too. A possible squib.

Since it failed to fire how could it have left anything in the barrel? News flas it could not

My thought, too. A possible squib.

Without more info, the person may have said fail to fire and just racked the slide, and the empty case ejected but he did not notice the projectile was gone.

in this case, the fired case ejected. The case was not split. I talked to Glock USA tech rep on the phone. He said it sounds like the broken spring caused the issue. I am going to replace the guide rod/spring. Is there a better aftermarket brand to get, or is the OEM piece adequate
This particular pistol was made in 1996. My brother in law carried it as an active duty Federal officer in his last posting. Part of his job was as a firearms instructor. I talked to the BIL today, and he says that pistol probably had over 5000 rounds through it. He subsequently gave it to my Son.