What do you guys prefer? I have an m4a1 and m4v5. I have been looking at an m4v7 to add another to the safe but i just dont see that much of a benefit to mlok and it looks like they arent nearly as tough as a quad rail. That being said with how light my quad rails are, is there any other real benefit? Just a fad? Maybe someone can sway my opinion. All opinions are welcome guys, thanks in advance.