Tu,
This looks pretty good.
A few items you should correct if you can. The Muzzle Reference Sight is installed backwards on the end of the barrel:
It should look like this (images from Prime Portal):
The front fenders (fixed sections) should not have the small tabs on the front edges, these are a consequence of the model making process. The fenders should be thinned to look more like thin metal sheet:
Your tracks seem a little to loose in some of the images, but M1 Abrams tracks are tensioned tight.
Since you have gone to such effort to create a digital camo pattern on your M1A2 SEP, you should repaint your rucksack covers in the newer ACU or MARPAT camo.
Still, I like your Abrams.