Guns are mechanical devices so they will fail from time to time. It's nature!
The most disconcerting failure I ever had was due to ammunition, not the gun. I was in Vietnam, shooting a .38spcl Combat Masterpiece, (great little gun). I had a squib load. How would I hear that in all the heat of battle? Fired one behind it. No burst barrel, but it looked like it suddenlty became pregnant. I guess that's why the ammo always seemed under powered to me. For my own protection. Dichotomy?