You have a different set of circumstances on an AR and a Mini 14 with scopes. If you put a scope on a bolt gun and fire it, you have one recoil. Most lower cost scopes are made to take recoil in only that direction. When you go to an AR or Mini 14, you have recoil in 2 directons, back then front when the bolt slams shut. Cheap scopes are not built to take the recoil of the bolt coming shut, and you will simply gut them in a few hundred rounds. By the time you screw around with them, might as well have done your homework and bought a scope that was designed for the AR, such as that new Leupold AR scope. About $400.
Whittington Center Life
Times are tough, ammo is expensive, there will be no warning shots.