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It's not a problem. I'm adult enough to admit when I've made a mistake. And I'm adult enough to thank a person for explaining why I'm wrong.
I'm also adult enough to defer to a former munitions maint. puke. :)
If it weren't for the fact that my employer was deadset on requals with the AR-15, I'd rather have a ruger mini-14 .223 with a good scope.
I've always been more of a sniper type. I like to take my time setting up a shot and take pride in hitting my target exactly where I aim, and the way that my employer requals doesn't promote taking your time and setting up a shot. They'd rather me stand and attempt to shoot a target. I know that I get better results when I can brace the weapon and take my time.

I was ammo...not weapons..so I'm not absolutely certain about guns..
BUT.
the mini-14 fires the same bullet (close enough)
as the AR-15..

Longer barrel...more accurate at distance..
you're right.

My employer thinks that this is still valley forge. We line up in a row of 25, aim and shoot. I'm always like, "Hey, this isn't the way I'd do it. I'd brace my weapon on the rail and shoot, or brace it on the hood of the car and shoot. I'm sure as hell not going to stand in a line and shoot. So your method is not only wrong, but it's also stupid. Besides that I'm a kitchen supervisor, I don't get to carry a weapon, other than my pepper spray and whatever tray or tethered tool I can get to."