I'm a LEO and I've seen hundreds of auto jams at the range.Some are maintenance,some are Goober induced
But,some are inherent in the nature of the mechanism and the conditions of
reactive close combat.Fouled draws,friction stoppages,dropped mags,spent brass bouncing off cover into the gun-seen'em all.
Yes,modern guns and modern ammo are extremely reliable.But,Murphy was born on a battlefield.
A recent personal incident hammered this home.
I pulled a toddler out of the mouth of a Shep/Chow mix and started shooting.On round #5,my Glock 17 failed to eject.I yanked out my BUG and finished him off(the dog,not the toddler.Kid was ok).
At the range,gun/ammo checked out.Recreating the shooting,I was finally able to induce the stoppage by holding my weak hand(I'm a lefty btw)above the ejection port.I believe that as I obtained a freestyle grip,my weak hand got above the gun and a shell bounced back into the ejection port.
I made this happen twice in 30 rounds intentionally...what are the odds of doing it unintentionally?
Surf YouTube for dash-cam videos of shootings and you'll see some combat malfs.