You might want to consider a Millett DMS-1 scope for your rifle. I have one mounted on one of my M-4 clones using a LaRue mounting system. I love it. People who see and handle the rifle love it and often try to buy it off of me right on the spot. Any way, google Millett DMS-1 sights. They are a 1 to 4 power variable scope and they cost just a little over $200 in cash.