PSA regarding the 'P' key

[pewpewpew42]

If you have Defensive AA active, and want to shut it off (presumably to shorten the cooldown), you can double-tap 'P'. This will stop Defensive Fire and immediately start the cooldown timer. Thought this would be useful.

[ValkyrWarframe]

Also note that P disables secondaries, so if you're a Kiev don't disable P.  You gotta get those CQEs. 

 

Kiev gets detected before her AA guns can fire anyway.