How Often do You Change Your Handgun Springs / Barrels?

[G]

Happy New Year to all of you!

A few weeks ago, one of my organisations Glocks had a slide lock spring snap (I happened to be the one using the gun at the time).

I put in a call to Glock and was told that I should be changing spring sets (recoil spring assembly, extractor spring & slide lock spring) every 5000 rds. Of course, I did so immediately on all of our glocks as they are all at or approaching 5000rds (and found that slide lock springs in three of them broke upon removal).

So, besides that Glock have introduced a thicker spring which will presumably not break as soon (no they did not issue a recall for the older, thinner spring, nor did they contact customers to tell them about the new part), I'd like to know how often you QP's change your spring sets / barrels.

Take Care...

G