looking for primary rear iron sight...not a backupIf they're strictly used as back up sights the inexpensive Magpul BUS polymer sights work well when mounted on a rail, however thy're not suitable for gas block mounting.
The one I have came with my M&P15. It looks like the one UTG sells. I have seen them in gun stores for around 30-50 bucksHappen to have a link to a good example?
Now that I'm thinking about it, interesting that the AR15/M16 is the only gun (to my knowledge) that has a carry handle.you wouldn't think a carry handle would be much use... until you have one on the rifle :danceban: