Overview: Tactical Mask renders the player immune to the effects of Nova Gas.

Its Pro version reduces the effects of Flash-bangs and Concussion Grenades on the player by 90%. This is to say that if hit by a Flash-bang, the player's vision will dim for a second before returning to normal. If hit by a Concussion Grenade, the player's vision will blur as if stunned, but movement and turning speed will be unaffected. This lasts for about two seconds before the player's vision returned to normal. It also reveals the general direction of any enemies that are hit with the player's Flash-bangs or Concussion Grenades via a small yellow directional indicator near the cross-hair. If multiple enemies are stunned or blinded by the player's tactical grenades, multiple arrows will show up on his cross-hair.

Pro Challenges:

• Flash Kills — Kill 20 enemies that are blinded by your Flashbang.
  
• Concussion Kills — Kill 20 enemies that are stunned by your Concussion Grenade.
  
• Nova Gas Kills — Kill 20 enemies poisoned by your Nova Gas.
  

----------

I haven't used this yet, but I will be looking forward to using it more often in HQ matches down the road. Anyone have this unlocked at Pro?

Tac Mask Pro is so useful. You get stunned/flashed for like 1/4 a second, and if you throw a stun/flash, you know where they are.