Most AR's end up spending their lives shooting at paper and cans etc. at maybe 50 yards,it honestly doesn't make one fig of difference what they look like:they're never going to shoot at anything past 100 yards and the chances of them being used on a living thing is mercifully nill.The reason people like the 11.5" with pinned on hiders is the same reason everyone has to have rails and optics on their AR's- oh wait, _you_ are going to use yours to engage zombies/UN paratroopers/Al Quaeda/crackheads at 900 yards,at night...AR's are simply toys for most people that have them,often for people with a little over active imagination,but they're by and large just for fun.I didn't buy a 16" flat top so I could more easily swing it around inside my house,I got it because it looked neat and wanted it,just like I'd want a pseudo XM177,for funsies.