What is Tac-Stance exactly?

[Shogun]

As above

[Splicer]

From my understanding it's basically hip firing but more precise. u also move alittle faster. You automatically enter tac stance if u aim while sliding.

[Larry]

ADS then melee to activate. You'll stay in tac stance if you switch to it this way unless you swap weapons or turn the stance off.

It's basically a way to instantly get better hipfire accuracy while having a slow ADS build. I've not seen it used much but in Zombies it's very fast and very accurate up to medium distances.

[Master Blaster]

Ads + V for me on pc tilts gun stays that way till another key movement ….got the 30 quick

[al64inthedark]

With a controller it is ADS and digital down.
It is quite good at close/medium range. When doing the challenge that is required for assault rifles, I use attachments that makes it spread more, it is fun.