Hello everyone I have two military issued AR-15/M-16 backup sights. These are flip up sights that can be folded up as a back up sight or used as a primary iron sight. As a primary these are very accurate. They are marked for use from 100 to 600 yerds and I have qualified with the same sights out to 600 so I know they are accurate. I have 2 of these will sell for 65 each shipped.