[Reno89519]

It is a common, simple shooting method in low light. Consider that it is easier to aim down the side corner of the barrel than trying to align the sights. And in close self-defense ranges, it it more than accurate enough.

[Pythion.net]

"Consider that it is easier to aim down the side corner of the barrel than trying to align the sights."

How do you "aim down the side corner of the barrel" when you can't even see the barrel? You can only see the slide.
And what "side corner"? Barrels are round (no corners).