I have two that I'm using. A NcStar 3x7x32, that is not that great, maybe 9 to12 inch relief, and a Simmons Pro Hunter, 2x6x32, that is very long, 20 or so inches. I like to dial them all the way up, to get a ghost ring for paralax management, but my arms are nearly too short for that Simmons. Lol