pf2e.fyi
From Pathfinder Guns & Gears, which isn't enabled.

Sniper's Aim

FEAT 6
Activity 2 actions
Prerequisites Way of the Sniper

You take an extra moment to carefully sync your aim and breathing, then fire a shot with great accuracy. Make a ranged weapon Strike. You gain a +2 circumstance bonus to this Strike's attack roll and ignore the target's concealment. If you're using a kickback firearm, you don't take the normal circumstance penalty on this Strike for not having the required Strength modifier or firing without using a stabilizer.

Pathfinder Guns & GearsORC