the centerpoint 4-16 that you can get at walmart is an excellent scope for the price. we have 2 of them (.22 mag and cheap bolt action .308) and they work great. quality isnt as good as a Leupold or vortex but for $70 you cant really beat it. i however would not put one on a gun that costs $900 or more. i'd go for a Leupold or vortex. the Leupold Mark AR would be a good option if you want to go cheap.