Lock On Feat 10
Source Pathfinder Guns & Gears
Prerequisites construct innovation
Aha! You lock on to your enemy's weak point to assist your construct companion in destroying it. When you Lock On, designate an enemy you can see. If your next action is to Command your construct, the construct gains a +2 circumstance bonus to attack rolls against the designated enemy until the end of the turn. If you use 2 actions for the Command, the bonus is instead a +3 circumstance bonus, or a +4 circumstance bonus if you're legendary in Crafting.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
InventorThis indicates abilities from the inventor class.