Well if you are using an optic, it is prudent to have BUIS, that's why they are called BACK UP. Optics help, but if it goes down, you've got iron sights. I never understand why people would pick an AR, take the carrying handle off to mount an optic and not even consider back up irons.
I am not a fan of AR pistols.
Totally agree.
http://sphotos-a.xx.fbcdn.net/hphotos-ash4/464803_468798116479459_198978136_o.jpg
I use the carry handle to not only carry but put the optic up where I can actually use it. I have BUIS as well. There are two flip up's and the standard piece in the handle. It really works once put on point.
Use-em if ya gott-em