“in this essay” The article you’ve written is not an essay. It is at its top, an opinion article
And as Vodulas points out, they generally serve as a game mechanic. Either you are recreating set guns from history or it’s lower level gun meant to be a bit crappier.
What even is this articles point? Iron sights are crappy? Yeah, we know, that’s why that was improved upon and they barely exist on IRL guns today