I'm more or less curious why flip-up sights gets such a bad reputation? I've talked to a bunch of AR-15 owners and ex-military who have used them, and it seems like a 60/40 split against flip-ups. They seem to have become a common thing, so apparently there's enough of a majority out there that likes them. I, personally, have not gotten a chance to use them. I am planning on getting a rear flip for an AR I'd like to build hopefully early next year. Just wondering why there seems to be such a love-it-or-hate-it attitude with them