Garandimal
member
Fair question.
The first failure was during an IDPA shoot. Trigger went dead. Tried a type I malfunction clearance. No dice. Trigger moved around funny inside the trigger guard. Found that one of the pins holding the trigger group in place had sheared. Because it was my carry gun, I wanted a Glock armorer to examine and fix it. He was unable to diagnose the cause of the failure, and simply replaced the pin with an OEM part.
The second was in practice, IIRC. Same failure. Armorer used a "stronger pin" this time. Ditto for third failure.
After the third pin failure and while considering what to do for a replacement gun, the recoil spring guide rod assembly shattered, disabling the slide. Again in practice.
I still have no idea what could have caused the pin failures. At this point, it doesn't really matter. And recoil spring assemblies are consumables. But a stoppage is a stoppage.
I noticed that lots of other IDPA and polite society shooters were using the then-relatively-new XD, without malfunctions. But that's another story.
Eating trigger pins...?
Yikes!
If you say so.
That is a big pin, too.
Grease the locking surfaces to dampen the shock.
Thousands of rounds and nary an issue.
100% reliable.
GR