I started with a Bushnell red/green dot that was great, but was a tube with very narrow window. Went next to a mueller quick shot and was great, but sat high and I had snow get in and block the reflected red dot. Then tried FFIII. Worked very well on my sons 20 g Remington. I was unable to have enough adjustment to get it lined in on my 24" 835. Sent back to Burris and they sent me a new one, still unable to get it lined in due to lack of enough adjustment. I am looking at an Eotech MRDS, and have asked Santa for it. Burris is great and my son is a dead eye with it. The company is 2nd to none.