I am torn between rifles here! I know the reputation of both manufacturers is well respected, and both are quality rifles! I would have the M40A5 built by Mark at SAC if I went that route and he makes tack driver rifles! But the AI platform has proven itself accurate and rugged as well. The AT is a new model that hasnt been put through its paces yet but I'm sure AI hasnt cut any corners on this project. I like the pistol grip chassis and the quick-lock barrels, as I'd probably purchase a few S/A calibers to go with the rifle. But....The M40 is proven! Damn.... Plz help me out, preferably guys who might have used both and know first hand some advantages I might be overlooking.