I think you'd have to remove to much material from the front of the Mini 14 reciever for the AR magazine to fit. With that much material removed up where the bolt locks I think you'd be looking at reciever failure because there won't be enough material left to support the bolt when it locked. The Ramline combo mags your talking about that fit the AR15,AR18,and Mini14 are narrow in front like a Mini 14 magazine.