The Quickshot Pistol has an 'Armor Piercing Ammo' upgrade that is described in-game as: "Bullets do extra damage to armored and mechanical targets".
What counts as an armored or mechanical target? Are vehicles, aircraft, structures (like the ones you destroy in missions), Murderbots or Wardens considered armored or mechanical for the purposes of the Quickshot Pistol's 'Armor Piercing Ammo' upgrade?