1990 S&W 4506 5000k + rounds
2007 S&W 4513TSW 200 rounds
1998 Glock 21 3rd Gen 3500 rounds

I've only had one malfunction occur with my gen 3's. It was many years ago. I suffered a bent firing pin after shooting a bag of reloads.
The Glock has never malfunctioned.
Although I witnessed 12 (yes twelve) Glock 19's all break down at exactly 2500 rounds during a class. We tried the two remaining guns in the batch( consecutive serial #'s), those broke down too. The problem was a poorly designed slide lock spring. Glock was well aware of it too.