The TAQ-56 is an absolute beamer at the moment. Here is the optimised build.
The TAQ-56 is one of the best performing AR's, and frankly weapons, in the game right now. Don't sleep on this absolute beamer. It is one of the original base weapons from Modern Warfare II so its likely you have it unlocked and maybe even fully levelled. Here is how to build it out with the tuning added in as well. It is a Long Range beamer.
Muzzle: Echoless-80 (+1.05 +0.43)
Barrel: 17.5" Tundra Pro Barrel (+0.27 +0.12)
Optic: Aim-OP V4 (-1.57 -1.65)
Underbarrel: FTAC Ripper 56 (+0.55 +0.17)
Magazine: 60 Round Mag