Actually the AUG A1 isnt all that bad....
It takes a pro to master the ump; Its not very powerful long range. If you master it though, it works long range. Here is my set.
Advanced Backpack:
Primary: AK47
Backpack Slot A: UMP (Switch with MK48 sometimes depending on map.)
Backpack Slot B: L96A1 (Switch with MK48 sometimes depending on map.)
g36 seems to have the most range - thats what matters to me!
followed closely by the aug