I have no experience whatsoever with the ATI stock. If LOP is of concern, though, Choate makes a telescoping stock for the Mini-14: http://www.riflestock.com/store/do/product/07-01-42
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman