If I have a lothal rebel with Ion turret, and ezra bridger gunner, and a docked attack shuttle after I fire out of my primary front arc will I be forced to choose between ezra trigger and attack shuttle trigger or will I get both? also if I choose ezra will I then get a attack shuttle trigger, will that trigger stack with the earlier trigger(if I were to get it)?

How many attacks could I get out of it 2, 3 or 4?

Hard limit of 1 bonus attack per ship per round.

http://infinitearenas.com/xw2rules/index.php?page=bonus-attack

Short answer 2.

Long answer

Or