Over the years I've found that the AUG shines as a 0-200 yard carbine, making me an Aimpoint and mini ACOG guy all day long. Using a 3 or 4x fixed power optic up close is slow (training be damned) as takes the brain a split second to register/combine peripheral vision with the magnified image. I can even tell quite a difference in short range acquisition between the TA44 and the T1. As long as you're willing to give up speed at closer distances, you can't go wrong with any ACOG, but most are left unimpressed with the amber models. It will boil down to your preferences. The eye relief issues of 4x ACOGs is grossly overstated. The only issue is if you demand to mount a rear BUIS
behind the ACOG.
The biggest PITA with mounting anything on an M1 is that every damned rail offered is a different height, so one needs to take careful measurements, research a lot, dig for manufacturer specs, and hopefully find a way to mount the desired optic at the proper height. If you're getting the new Pete rail, then your height over comb would be about the same as an AR, which makes your life
MUCH simpler for mounting optics, and you can simply choose your preferred AR mounting height.