Many Tennessee cities and municipalities require open carry in the hand. Cities which have this as a law keep it to remind blacks to stay in their place. It is a proud racist tradition from 1871.
Require? So you are saying that this is not an option but an ONLY allowed method of open carry in these areas? Wow! I bet cops love it!
As for the other 2 options...
I'll skip the entire sling argument - obviously the best way to carry a rifle, but not a pistol. Now since ATF has it's head up it's ass and classify as a "handgun" what essentially is a semi-auto version of an AK paratrooper carbine, I guess you can call it a pistol. ATF also calls my semi-auto full size AK an "assualt weapon", which is technically just as wrong as a "pistol", so let it be their problem. I described my strong feelings about not carrying these types of arms for personal defense against humans in urban areas in another thread, so I won't get into that one either.
As for the "mexican carry", this obviously a worse option than a holster. No retention, no trigger protection, but a good chance of it falling down your pants or being grabbed or catching something with the trigger and going bang into your leg, etc, etc, etc. There is a reason why only dumbass gangstas do it and everyone else uses holsters.
There are enough holster options out there for every taste and purpose so there is really no reason to carry it "mexican style" and especially saying that it's better.
