Pros: The animations are good. Nothing more, nothing less.
The model is awesome, it is really shaped to be badass, as the AR2 should be. It does not have that 'OMG, this is DETAIL' feeling some of the models in the CSS section have, but it works just fine.
There is some really good detail on the texture. The scratches, the dirt. I absolutely love what you did with the 'scope'.
All this thing is missing is that reload mechanism the original AR2 had xD
The sounds, which for some reason are not in the criteria, do not work well within the game. The bass appears to be missing while firing in full auto (which really makes the gun sound a lot less powerfull, and bland, even).
The gun appears to be missing that special thing that makes it look 'Combine-ish', like Valve did with their SMG.
And last, but certainly not least: The World texture of this weapon is utterly broken. As in really, as in the game can not read it and shows an black and purble checkerboard instead of the actual texture.
Fix the world texture!
Make a blue-ish version with a combine logo. Or something. I love the textures, but sometimes the colours seem a bit off (in certain light conditions). That's just a taste issue though, so don't worry to much about that.
See if you can find "shorter" sounds, which sound bassy and powerfull from the beginning, as per the problem described above.
You can beef up the animations a little, for example by including a "grenade" reload animation.
I tested this in Episode 1 (The Minerva: Metastasis mod, specifically).
The fact that the world textures did not work have not impacted the texture score.
Why did you not include a sound criteria?