Tasco pro point red/green dot sight with one half inch raising rail $45
AR carry handle rear sight $25
I used both on my ruger ar15 tried the carry handle loved the look but my son convinced me to try a red dot as my eyes are getting old and I am cross dominate so sighting was a challange, well I liked the red dot enough to get an expensive one so this inexpensive one is now for sale. Absoulate cowitness on my flat top ruger with the fixed front sight